[T-Mobile, Samsung Galaxy SIII] Perseus:
Thanks for the Initiative. I will try to help best I can. I came here after getting Blues from the effort I saw on International SIII Bloat Thread. In that thread there is a lot of Discussion on what each App does. Some we do have on SGH-T999 others we do not. You may also want to look at this Spreadsheet over here. Also please Look at this Sys app Mover. It gives a good Explanation of what the app does. You don't need the app per se if you have Titanium Pro. Lastly for those of you who don't have root, try My Backup Pro. For those who do, look at this thread after Titaium Backup.

Let me Provide Explanation to those that I know. Once you update main thread, I will Delete mine.

This is EDIT2 - Removed the ones serendipityguy has already updated in his post.

BackupRestoreConfirmation.apk - Google Backup & Restore Via Settings > Backup and Restore. Keep Do Not Remove

ChromeBookmarksSyncAdapter.apk - Please Mark this is DO NOT REMOVE.

GoogleServicesFramework.apk - The Core of entire Android Backbone to Google Services. DO NOT REMOVE.

KIES - Please Mark all 3 Entries of KIES (Regular, Air & Wifi) as Safe to Remove not Recommended. You will never get JB 4.2 Or Emergency Recovery Firmware if you remove any of them.

LuminousDots.apk - The Wallpaer Collection called Luminous Dots.

Magazines.apk - Google Magazines from Play.

Nfc.apk - The Fabled NFC Service.

NfcTest.apk - Part of the NFC Service.

PhaseBeam.apk - More Wallpapers. This time Live Wallpapers.

PhotoWall.apk - This one is for MMS that send and Receive Photo Slide show.

PolarisViewer.apk - The Samsung document Viewer Demo/Lite Version.

I will Cover all the Samsung Apps later. It will take a lot of time. Please Do not Mark any of these items as Safe to Delete until I am finished Testing.

Suffice it to say that if you want your warranty intact and want that JB 4.2 then Don't touch this.

SamsungApps.apk - This is Samsung App Market. Similar to Google Play. It can be removed unless you like to buy Apps from there.

SamsungAppsUNA3.apk - AFAIK Samsung Apps Authentication program.

SamsungCamera.apk - The standard Camera App. This is NOT Android Camera App. DO NOT REMOVE.

SamsungIME.apk

Samsungservice.apk

SamsungTTS.apk - For Hearing Challenged users.

SamsungWidget_FavoriteApp.apk - This is a widget for Application Suggestions from Samsung Apps. Same to Remove.

sCloudBackupProvider.apk - Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudDataRelay.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudDataSync.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudSyncBrowser.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudSyncCalendar.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudSyncContacts.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

sCloudSyncSMemo.apk - Part of Samsung Backup Sync. If you use Android Default Google Drive Backup, then its safe to delete.

SecBluetooth.apk - Samsung Customized Bluetooth Radio. Do Not Remove.

SecBrowser.apk - Default Browser called Internet on the Phone. Do Not Remove.

SecCalendar_NAmerica.apk - Competing Samsung Application to Google Calender. Safe to Remove.

SecCalendarProvider.apk - Part of Samsung Calender App. Safe to Remove.

SecContacts.apk - Samsung Contacts. Competing App to Android Contacts. I am not sure if its safe to remove or not. Better keep it than sorry. Especially since you don't have Authentic Android Phone App.

SecContactsProvider.apk - Samsung Contact Sync.

SecDownloadProvider.apk

SecDownloadProviderUi.apk

SecEmail.apk - Samsung Email Client.

SecExchange.apk - Samsung Email Exchange Configuration settings.

SecFactoryPhoneTest.apk

SecFileShareClient.apk

SecFileShareServer.apk

SecGallery2.apk

SecHTMLViewer.apk

SecLauncher2.apk - Part of the Touchwiz UI. Safe to remove if you are using other launchers. Keep a backup in case something else FCs.

SecLiveWallpapersPicker.apk - Live Wallpapers. Safe to Remove.

SecMediaProvider.apk

SecOmaDownloadProvider.apk

SecPhone.apk - Samsung Replacement to Phone App.

SecSettings.apk

SecSettingsProvider.apk

SecTelephonyProvider.apk

SecurityProvider.apk

SecWallpaperChooser.apk - More Wallpapers.

SMemoProvider.apk - Related to SMEMO.

Samsung Apps Warning Complete.

Superuser.apk - I'd Reccomend to replace this with SuperSU.

SysScope.apk - More of the Dreaded Big Scary. One of the Ones that can void your Warranty I explained above.

Tag.apk - Needed for NFC

Talk.apk - Google Talk Client. DO NOT REMOVE.