Recompressed images.

Following is the list of assets which were optimized:

    1C-Bitrix.png                         376b =>  369b (98%)
    1und1.png                             294b =>  288b (97%)
    2z Project.png                        771b =>  589b (76%)
    3dCart.png                            475b =>  341b (71%)
    3DM.png                               633b =>  631b (99%)
    3ware.png                             633b =>  631b (99%)
    Accessible Portal.png                 692b =>  690b (99%)
    AddThis.png                           153b =>  152b (99%)
    Adobe ColdFusion.png                 1184b =>  323b (27%)
    Adobe CQ5.png                         785b =>  783b (99%)
    Adobe GoLive.png                      375b =>  374b (99%)
    Advanced Web Stats.png                877b =>  872b (99%)
    Amaya.png                             572b =>  454b (79%)
    amCharts.png                          164b =>  117b (71%)
    Ametys.png                            570b =>  567b (99%)
    Amiro.CMS.png                         420b =>  414b (98%)
    AMPcms.png                            787b =>  786b (99%)
    AngularJS.png                         725b =>  721b (99%)
    AOLserver.png                         483b =>  473b (97%)
    Apache Hadoop.png                     588b =>  587b (99%)
    Apache JSPWiki.png                    573b =>  572b (99%)
    Apache Traffic Server.png             832b =>  830b (99%)
    Arc Forum.png                         385b =>  384b (99%)
    AT Internet Analyzer.png              508b =>  329b (64%)
    AT Internet XiTi.png                  508b =>  329b (64%)
    Atlassian Confluence.png              485b =>  472b (97%)
    Atlassian Jira.png                    773b =>  583b (75%)
    AWStats.png                           868b =>  499b (57%)
    Backbone.js.png                       832b =>  806b (96%)
    Banshee.png                           335b =>  254b (75%)
    BaseHTTP.png                          624b =>  621b (99%)
    BIGACE.png                            669b =>  666b (99%)
    Bigcommerce.png                       646b =>  587b (90%)
    BigDump.png                           714b =>  711b (99%)
    Bigware.png                           761b =>  758b (99%)
    BittAds.png                           344b =>  218b (63%)
    Blogger.png                           204b =>  200b (98%)
    Boa.png                               714b =>  711b (99%)
    BrowserCMS.png                        569b =>  563b (98%)
    Bugzilla.png                          694b =>  692b (99%)
    Burning Board.png                     667b =>  659b (98%)
    Business Catalyst.png                 400b =>  393b (98%)
    CacheFly.png                          349b =>  348b (99%)
    CakePHP.png                           707b =>  706b (99%)
    Canon.png                             680b =>  678b (99%)
    Catwalk.png                           680b =>  678b (99%)
    CentOS.png                            680b =>  677b (99%)
    CFML.png                             1184b =>  323b (27%)
    Chameleon.png                         783b =>  779b (99%)
    Chamilo.png                           597b =>  594b (99%)
    Chartbeat.png                         133b =>  132b (99%)
    CherryPy.png                          375b =>  332b (88%)
    ClickHeat.png                         551b =>  539b (97%)
    ClickTale.png                         750b =>  640b (85%)
    Clicky.png                            711b =>  699b (98%)
    Cloudera.png                          501b =>  500b (99%)
    CloudFlare.png                        616b =>  614b (99%)
    CMS Made Simple.png                   572b =>  269b (47%)
    CO2Stats.png                          644b =>  642b (99%)
    Commerce Server.png                   367b =>  364b (99%)
    CompaqHTTPServer.png                  598b =>  589b (98%)
    comScore.png                          538b =>  537b (99%)
    Concrete5.png                         763b =>  761b (99%)
    Contao.png                            308b =>  301b (97%)
    ContentBox.png                        794b =>  624b (78%)
    ConversionLab.png                     658b =>  657b (99%)
    Coppermine.png                        221b =>  220b (99%)
    Cosmoshop.png                         240b =>  236b (98%)
    Cotonti.png                           538b =>  520b (96%)
    CouchDB.png                           445b =>  429b (96%)
    CPG Dragonfly.png                     415b =>  407b (98%)
    Crazy Egg.png                         313b =>  303b (96%)
    CS Cart.png                           317b =>  315b (99%)
    CubeCart.png                          739b =>  734b (99%)
    Cufon.png                             758b =>  755b (99%)
    d3.png                                714b =>  711b (99%)
    Danneo CMS.png                        352b =>  231b (65%)
    Darwin.png                            303b =>  203b (66%)
    dashCommerce.png                      714b =>  711b (99%)
    DataLife Engine.png                   776b =>  420b (54%)
    Debian.png                            210b =>  203b (96%)
    DedeCMS.png                           841b =>  834b (99%)
    default.png                           714b =>  711b (99%)
    Dell.png                              503b =>  455b (90%)
    DHTMLX.png                            128b =>  127b (99%)
    DirectAdmin.png                       513b =>  407b (79%)
    Disqus.png                            435b =>  423b (97%)
    Django.png                            369b =>  364b (98%)
    Dokeos.png                            725b =>  721b (99%)
    DokuWiki.png                          363b =>  355b (97%)
    DotNetNuke.png                        705b =>  702b (99%)
    Drupal Commerce.png                   836b =>  834b (99%)
    Drupal.png                            647b =>  637b (98%)
    dwhttpd.png                           714b =>  711b (99%)
    Dynamicweb.png                        633b =>  571b (90%)
    E-Merchant.png                        363b =>  314b (86%)
    e107.png                              640b =>  638b (99%)
    EdgeCast.png                          704b =>  700b (99%)
    eHTTP.png                             714b =>  711b (99%)
    ELOG HTTP.png                         252b =>  203b (80%)
    ELOG.png                              252b =>  203b (80%)
    Eloqua.png                            219b =>  196b (89%)
    Embedthis-http.png                    614b =>  496b (80%)
    Enyo.png                              359b =>  203b (56%)
    EPrints.png                           742b =>  659b (88%)
    Erlang.png                            312b =>  247b (79%)
    eSyndiCat.png                         836b =>  735b (87%)
    EWS-NIC4.png                          503b =>  455b (90%)
    Express.png                           714b =>  711b (99%)
    ExtJS.png                             292b =>  283b (96%)
    Fact Finder.png                        97b =>   96b (98%)
    FAST ESP.png                          971b =>  752b (77%)
    FAST Search for SharePoint.png        552b =>  548b (99%)
    Fedora.png                            590b =>  244b (41%)
    FlashCom.png                          714b =>  711b (99%)
    FluxBB.png                            341b =>  332b (97%)
    Flyspray.png                          359b =>  350b (97%)
    FreeBSD.png                           856b =>  853b (99%)
    FrontPage.png                         477b =>  367b (76%)
    FWP.png                               402b =>  306b (76%)
    G-WAN.png                             271b =>  173b (63%)
    Gallery.png                           597b =>  596b (99%)
    Gambio.png                            846b =>  738b (87%)
    Gauges.png                            174b =>  173b (99%)
    Gentoo.png                            872b =>  870b (99%)
    GetSimple CMS.png                     281b =>  213b (75%)
    GoAhead.png                           614b =>  496b (80%)
    Google Analytics.png                  366b =>  360b (98%)
    Google App Engine.png                 562b =>  561b (99%)
    Google Charts.png                     650b =>  551b (84%)
    Google Code Prettify.png              664b =>  446b (67%)
    Google Font API.png                   804b =>  799b (99%)
    Google Maps.png                       688b =>  685b (99%)
    Google Sites.png                      999b =>  998b (99%)
    Google Web Toolkit.png                800b =>  796b (99%)
    GoStats.png                           817b =>  815b (99%)
    Graffiti CMS.png                      455b =>  450b (98%)
    Grandstream.png                       390b =>  384b (98%)
    Gravatar.png                          691b =>  690b (99%)
    Gravity Insights.png                  291b =>  286b (98%)
    GX WebManager.png                     691b =>  687b (99%)
    Hiawatha.png                          565b =>  561b (99%)
    Highcharts.png                        477b =>  475b (99%)
    Highstock.png                         477b =>  475b (99%)
    Hogan.js.png                          714b =>  711b (99%)
    HP ProCurve.png                       598b =>  589b (98%)
    HubSpot.png                           690b =>  543b (78%)
    IBM HTTP Server.png                   128b =>  102b (79%)
    IBM WebSphere Commerce.png            128b =>  102b (79%)
    IBM WebSphere Portal.png              128b =>  102b (79%)
    IIS.png                               859b =>  858b (99%)
    ImpressPages.png                      255b =>  254b (99%)
    Indexhibit.png                        714b =>  711b (99%)
    Indico.png                            485b =>  380b (78%)
    InstantCMS.png                        293b =>  283b (96%)
    IntenseDebate.png                     991b =>  717b (72%)
    iWeb.png                              221b =>  219b (99%)
    JAlbum.png                            518b =>  454b (87%)
    Java Servlet.png                      480b =>  476b (99%)
    Java.png                              480b =>  476b (99%)
    Javascript Infovis Toolkit.png        714b =>  711b (99%)
    JavaServer Faces.png                  184b =>  183b (99%)
    JavaServer Pages.png                  480b =>  476b (99%)
    Jetty.png                             743b =>  675b (90%)
    Jo.png                                257b =>  256b (99%)
    Joomla.png                            767b =>  764b (99%)
    jqPlot.png                            616b =>  615b (99%)
    jQTouch.png                           888b =>  884b (99%)
    jQuery Mobile.png                     565b =>  563b (99%)
    jQuery Sparklines.png                 714b =>  711b (99%)
    jQuery UI.png                         484b =>  483b (99%)
    jQuery.png                            565b =>  563b (99%)
    JS Charts.png                         550b =>  545b (99%)
    Kampyle.png                           928b =>  914b (98%)
    Kendo UI.png                          699b =>  634b (90%)
    Kentico CMS.png                       690b =>  687b (99%)
    KISSmetrics.png                       754b =>  738b (97%)
    Koego.png                             143b =>  142b (99%)
    Kohana.png                            608b =>  604b (99%)
    Kolibri CMS.png                       377b =>  376b (99%)
    Koobi.png                             484b =>  475b (98%)
    KS_HTTP.png                           680b =>  678b (99%)
    LabVIEW.png                           230b =>  187b (81%)
    Laravel.png                           409b =>  331b (80%)
    LEPTON.png                            400b =>  399b (99%)
    Less.png                              744b =>  595b (79%)
    libwww-perl-daemon.png                263b =>  196b (74%)
    Liferay.png                           526b =>  518b (98%)
    LightMon Engine.png                   716b =>  707b (98%)
    lighttpd.png                          659b =>  549b (83%)
    LimeSurvey.png                        658b =>  656b (99%)
    LiteSpeed.png                        1406b =>  194b (13%) *
    Livefyre.png                         6961b =>  707b (10%)
    LiveStreet CMS.png                    956b =>  743b (77%)
    Lockerz Share.png                     270b =>  249b (92%)
    Locomotive.png                        691b =>  689b (99%)
    Logitech Media Server.png             255b =>  241b (94%)
    Lotus Domino.png                      103b =>  102b (99%)
    Magento.png                           679b =>  675b (99%)
    Mambo.png                             765b =>  763b (99%)
    MantisBT.png                          546b =>  372b (68%)
    MaxSite CMS.png                       865b =>  777b (89%)
    MediaElement.js.png                   217b =>  123b (56%)
    MediaWiki.png                         920b =>  916b (99%)
    Meebo.png                             245b =>  141b (57%)
    Microsoft ASP.NET.png                 597b =>  582b (97%)
    Microsoft SharePoint.png              552b =>  548b (99%)
    MiniServ.png                          714b =>  711b (99%)
    Mint.png                              389b =>  377b (96%)
    Mixpanel.png                          632b =>  618b (97%)
    MOBOTIX.png                           718b =>  715b (99%)
    MochiKit.png                          584b =>  579b (99%)
    Modernizr.png                         113b =>  108b (95%)
    MODx.png                              606b =>  604b (99%)
    mod_python.png                        611b =>  607b (99%)
    mod_rack.png                          682b =>  677b (99%)
    mod_rails.png                         682b =>  677b (99%)
    mod_ssl.png                           353b =>  248b (70%)
    mod_wsgi.png                          203b =>  199b (98%)
    MoinMoin.png                          420b =>  379b (90%)
    Mojolicious.png                       692b =>  688b (99%)
    Mondo Media.png                       684b =>  673b (98%)
    MongoDB.png                           474b =>  414b (87%)
    Mongrel.png                           300b =>  293b (97%)
    Mono.png                              785b =>  647b (82%)
    Moodle.png                            536b =>  532b (99%)
    Moogo.png                             476b =>  472b (99%)
    MooTools.png                          323b =>  317b (98%)
    Movable Type.png                      436b =>  428b (98%)
    Mura CMS.png                          850b =>  681b (80%)
    MyBB.png                              251b =>  176b (70%)
    MyBlogLog.png                         838b =>  831b (99%)
    Mynetcap.png                          524b =>  521b (99%)
    MySQL.png                             468b =>  318b (67%)
    Nedstat.png                           594b =>  338b (56%)
    Netmonitor.png                        916b =>  912b (99%)
    node.js.png                           415b =>  413b (99%)
    NOIX.png                              435b =>  430b (98%)
    Nokia Maps.png                        636b =>  519b (81%)
    OneStat.png                           933b =>  931b (99%)
    Open Web Analytics.png                163b =>  158b (96%)
    OpenCart.png                          466b =>  464b (99%)
    openEngine.png                        420b =>  293b (69%)
    OpenGrok.png                          564b =>  427b (75%)
    OpenGSE.png                           831b =>  827b (99%)
    OpenLayers.png                        671b =>  568b (84%)
    OpenSSL.png                           353b =>  248b (70%)
    OpenText Web Solutions.png            447b =>  392b (87%)
    Optimizely.png                        738b =>  737b (99%)
    Oracle Application Server.png         219b =>  196b (89%)
    Oracle Recommendations On Demand.png  161b =>  153b (95%)
    osCommerce.png                        324b =>  319b (98%)
    Outbrain.png                          530b =>  527b (99%)
    OXID eShop.png                        393b =>  384b (97%)
    PANSITE.png                           631b =>  624b (98%)
    papaya CMS.png                        405b =>  403b (99%)
    Pardot.png                            722b =>  594b (82%)
    Parsely.png                           475b =>  471b (99%)
    PerfSONAR-PS.png                      649b =>  647b (99%)
    Perl.png                              263b =>  196b (74%)
    PHP-Fusion.png                        845b =>  695b (82%)
    PHP-Nuke.png                          751b =>  746b (99%)
    phpAlbum.png                          477b =>  475b (99%)
    phpBB.png                             606b =>  601b (99%)
    Phpcms.png                            446b =>  438b (98%)
    phpDocumentor.png                     373b =>  367b (98%)
    phpMyAdmin.png                        593b =>  486b (81%)
    phpPgAdmin.png                        331b =>  237b (71%)
    phpSQLiteCMS.png                      362b =>  359b (99%)
    phpwind.png                           496b =>  467b (94%)
    Plentymarkets.png                     333b =>  204b (61%)
    Plesk.png                             746b =>  742b (99%)
    Plone.png                             197b =>  194b (98%)
    Plura.png                             657b =>  653b (99%)
    Post.png                              667b =>  663b (99%)
    Powergap.png                          675b =>  674b (99%)
    Prefix-Free.png                       669b =>  504b (75%)
    Prototype.png                         645b =>  549b (85%)
    Protovis.png                          714b =>  711b (99%)
    Python.png                            624b =>  621b (99%)
    Quantcast.png                         804b =>  670b (83%)
    Quick.Cart.png                        563b =>  250b (44%)
    Raphael.png                           630b =>  629b (99%)
    RBS Change.png                        560b =>  551b (98%)
    RCMS.png                              603b =>  471b (78%)
    ReallyCMS.png                         847b =>  845b (99%)
    Reddit.png                            481b =>  473b (98%)
    Redmine.png                           400b =>  399b (99%)
    Reinvigorate.png                      710b =>  707b (99%)
    RequireJS.png                         359b =>  355b (98%)
    Reveal.js.png                         242b =>  139b (57%)
    RiteCMS.png                           409b =>  259b (63%)
    RoundCube.png                         689b =>  688b (99%)
    Ruby on Rails.png                     466b =>  465b (99%)
    Ruby.png                              740b =>  737b (99%)
    S.Builder.png                         212b =>  204b (96%)
    s9y.png                               748b =>  742b (99%)
    SAP.png                               454b =>  385b (84%)
    Sarka-SPIP.png                        728b =>  725b (99%)
    script.aculo.us.png                   623b =>  622b (99%)
    SDL Tridion.png                       642b =>  636b (99%)
    Sencha Touch.png                      516b =>  504b (97%)
    Seoshop.png                           803b =>  800b (99%)
    ShareThis.png                         677b =>  676b (99%)
    ShinyStat.png                         332b =>  252b (75%)
    Shopalize.png                         713b =>  711b (99%)
    Shopatron.png                         415b =>  299b (72%)
    Shopify.png                           790b =>  787b (99%)
    SiteCatalyst.png                      253b =>  247b (97%)
    SiteEdit.png                          263b =>  254b (96%)
    Smartstore.png                        325b =>  315b (96%)
    SMF.png                               265b =>  255b (96%)
    sNews.png                             275b =>  270b (98%)
    Snoobi.png                            420b =>  419b (99%)
    SOBI 2.png                            154b =>  153b (99%)
    SoundManager.png                      539b =>  537b (99%)
    SPDY.png                              549b =>  481b (87%)
    SPIP.png                              747b =>  742b (99%)
    Splunk.png                            437b =>  427b (97%)
    Splunkd.png                           437b =>  427b (97%)
    SQLite.png                            649b =>  647b (99%)
    Squarespace.png                       441b =>  427b (96%)
    Squiz Matrix.png                      816b =>  808b (99%)
    StatCounter.png                       585b =>  575b (98%)
    Store Systems.png                     599b =>  597b (99%)
    SublimeVideo.png                      834b =>  833b (99%)
    Subrion.png                           950b =>  929b (97%)
    SunOS.png                             219b =>  196b (89%)
    Supersized.png                        535b =>  292b (54%)
    SUSE.png                              573b =>  419b (73%)
    SWFObject.png                         303b =>  296b (97%)
    Swiftlet.png                          493b =>  488b (98%)
    Tealeaf.png                           394b =>  391b (99%)
    Textpattern CMS.png                   806b =>  803b (99%)
    Tiki Wiki CMS Groupware.png           731b =>  730b (99%)
    Timeplot.png                          730b =>  726b (99%)
    TinyMCE.png                           273b =>  268b (98%)
    TomatoCart.png                        206b =>  202b (98%)
    Trac.png                              160b =>  158b (98%)
    TWiki.png                             318b =>  317b (99%)
    Twilight CMS.png                      472b =>  426b (90%)
    Twitter Bootstrap.png                 530b =>  528b (99%)
    Typekit.png                           692b =>  690b (99%)
    TYPO3.png                             434b =>  300b (69%)
    Ubercart.png                          850b =>  847b (99%)
    Ubuntu.png                            425b =>  419b (98%)
    Umbraco.png                           576b =>  563b (97%)
    Underscore.js.png                    1406b =>  108b ( 7%) *
    UNIX.png                              562b =>  277b (49%)
    UserRules.png                         886b =>  884b (99%)
    UserVoice.png                         610b =>  607b (99%)
    Vanilla.png                           723b =>  722b (99%)
    vBulletin.png                         916b =>  914b (99%)
    VideoJS.png                           313b =>  311b (99%)
    viennaCMS.png                         714b =>  711b (99%)
    Vignette.png                          401b =>  393b (98%)
    Vimeo.png                             358b =>  351b (98%)
    VirtueMart.png                        860b =>  856b (99%)
    VisualPath.png                        658b =>  657b (99%)
    Volusion.png                          347b =>  334b (96%)
    Vox.png                               175b =>  172b (98%)
    VP-ASP.png                            267b =>  264b (98%)
    W3Counter.png                         731b =>  730b (99%)
    Web Optimizer.png                     534b =>  522b (97%)
    webEdition.png                        426b =>  418b (98%)
    WebGUI.png                            652b =>  634b (97%)
    WebPublisher.png                      386b =>  375b (97%)
    Websale.png                           677b =>  549b (81%)
    WebsiteBaker.png                      636b =>  625b (98%)
    WebsPlanet.png                        447b =>  384b (85%)
    Webtrekk.png                          447b =>  353b (78%)
    Weebly.png                            357b =>  353b (98%)
    WikkaWiki.png                         754b =>  685b (90%)
    Windows Server.png                    872b =>  870b (99%)
    Wix.png                               712b =>  621b (87%)
    Wolf CMS.png                          252b =>  248b (98%)
    Woopra.png                            892b =>  887b (99%)
    WordPress Super Cache.png             714b =>  711b (99%)
    WordPress.png                         286b =>  284b (99%)
    Wowza Media Server.png                519b =>  512b (98%)
    Xajax.png                            1000b =>  998b (99%)
    XAMPP.png                             556b =>  553b (99%)
    Xanario.png                           605b =>  473b (78%)
    XenForo.png                           315b =>  307b (97%)
    XMB.png                               701b =>  697b (99%)
    XOOPS.png                             616b =>  615b (99%)
    xtCommerce.png                        549b =>  441b (80%)
    xui.png                               649b =>  644b (99%)
    YaBB.png                              379b =>  369b (97%)
    Yandex.Metrika.png                    453b =>  448b (98%)
    YouTube.png                           319b =>  313b (98%)
    YUI.png                               671b =>  670b (99%)
    Zen Cart.png                          947b =>  943b (99%)
    Zend.png                              429b =>  428b (99%)
    Zepto.png                             784b =>  776b (98%)
    Zinnia.png                            872b =>  868b (99%)
    ZK.png                                435b =>  431b (99%)
    ZURB Foundation.png                  3182b =>  464b (14%)

In order to verify that the applied optimizations were lossless, one might use ImageMagick via the following command    :

    compare -verbose -metric mae old.png new.png null:

LiteSpeed.png and Underscore.js.png were wrongly labeled as PNG images, for they were favicons (image/vnd.microsoft.ico).
These images were replaced with their PNG counterparts.