mySociety (<a href="http://www.mysociety.org/jobs" >http://www.mysociety.org/jobs</a>) - UK
mySociety is a community of coders and technology fiends using our talents to make the world a better place, and we're looking for web developers and designers.
We've previously built sites and software like
TheyWorkForYou.com
FixMyStreet.com
WhatDoTheyKnow.com
Alaveteli.org
Mzalendo.com
FixMyTransport.com
WriteToThem.com
We like Ruby, Perl, Python, Django, Rails, node.js, HTML, CSS, PHP and a whole lot more.  Perks include not having to commute, as we nearly all work from home.
<a href="http://mysocietyltd.theresumator.com/apply/olHAWM/Web-Developer.html" >http://mysocietyltd.theresumator.com/apply/olHAWM/Web-Develo...</a>
<a href="http://mysocietyltd.theresumator.com/apply/wqRSrE/Designer-For-Web-And-Mobile.html" >http://mysocietyltd.theresumator.com/apply/wqRSrE/Designer-F...</a>