Edit 2: Link below is for stock Deodexed / zip aligned .apks updated 9/15/2010
Link below is for deodexed framework
I'm going to start compiling a list of what applications can be removed and what the applications do. I'm going to list the files as they appear in the stock /system/app folder and go from there.
If you remove the .apk then also remove the .odex if its there. Not all files have .odex counterparts and some roms omit them entirely. Keep that in mind.
You can also just rename the file by adding .del and ignore the .odex file if you want to double check if it will cause problems. An easy way to do this without screwing around in ADB is to download Titanium backup from the market (free). You can go to the backup/restore section and simply tap the file / app in question and hit freeze. You can thaw it later if it screws anything up
This is meant as a guide, if you screw up your device by removing something I am not responsible. I will try to keep this updated.
AccountAndSyncSettings.apk - It does what its name implies don't delete it.
AlarmClock.apk - If you don't need the alarm clock or use a third party app for it then you can delete it.
amazonmp3.apk - Amazon mp3 purchase and downloads. You can delete this.
ApplicationsProvider.apk - Don't remove this
Asphalt5_DEMO_ANMP_Samsung_D700_Sprint_ML.apk - Demo game, can be removed
audioTuning.apk - Unknown
BluetoothOPP.apk - Bluetooth, if you don't use it you can remove it but it can impact wifi as well. I had issues with wifi after removing the bluetooth services (everything).
BluetoothServices.apk - Bluetooth, if you don't use it you can remove it but it can impact wifi as well. I had issues with wifi after removing the bluetooth services (everything).
BluetoothTestMode.apk - Bluetooth, if you don't use it you can remove it but it can impact wifi as well. I had issues with wifi after removing the bluetooth services (everything).
Brightness.apk - I've removed this but sliding your finger on the top status bar will no longer adjust brightness without this installed.
Browser.apk - Can remove if you use a third party browser instead of the stock one
BuddiesNow.apk - Can be removed, social network crap
CallSetting.apk - Don't remove
Camera.apk - You can remove it but obviously your camera won't work
CameraFirmware.apk -You can remove it but obviously your camera won't work
CertInstaller.apk - I believe this loads security certs from the SD card but I'm not sure
cm-android.apk - Needed for visual voice mail
Contacts.apk - Self Explanatory
ContactsProvider.apk - Self Explanatory
CT.apk - I don't know what it does leave it
DataCreate.apk - Don't remove it
DeviceManagement.apk - Don't remove
DialerTabActivity.apk - Don't remove
Divx.apk - Video playback, don't remove
Dlna.apk - If you won't use it you can remove it
DM.apk - This does a lot of stuff don't delete it
DownloadProvider.apk - Don't delete it
DrmProvider.apk - some people say you can delete this I ran into trouble with media scanner not being able to pick up my files after removing this and the other *DRM*.apks
DrmUA.apk - some people say you can delete this I ran into trouble with media scanner not being able to pick up my files in certain applications
Dun.apk - Dial Up networking. if you won't use your device to connect via bluetooth for DUN you can remove this
Email.apk - Secondary Email app. You can delete this if you don't use it
EnhancedGoogleSearchProvider.apk - This can be deleted. it controls search results popping up as you type in google search fields
Facebook1.2.apk - you can remove this
FactoryTest.apk - I removed this with no issues, do not know what it does
FlashPlugin.apk - Flash light plugin you can remove this
FlashSVGPlayer.apk - Flash light player it can be removed
Gallery3D.apk - Do not remove this
GlobalSearch.apk - You can remove this, I found zero impact
Gmail.apk - If you don't use gmail you can remove this
GmailProvider.apk - remove this if you remove Gmail.apk
GoogleApps.apk - Leave it
GoogleCheckin.apk - I left it, you can remove it others have said it doesn't have an impact
GoogleContactsSyncAdapter.apk - leave it
GooglePartnerSetup.apk - leave it
GoogleSearch.apk - This can be removed, the device will still search goolge
GoogleSettingsProvider.apk - leave it
GoogleSubscribedFeedsProvider.apk - leave it
GpsSetup.apk - I have deleted this with zero issues
gtalkservice.apk - Do not remove, breaks market
HiddenMenu.apk - Do not remove force close
HTMLViewer.apk - you can remove it, junk
InputEventApp.apk - Not sure what this does so far not issues after removing it
JobManager.apk - removed no issues, ties in with included task killer perhaps?
KeyBoardSlideUpCounter.apk - counts how often your keyboard slide is used. Removed.
Keytracer.apk - Not sure what this does, leave it.
kickback_1.0.0_market.apk - can be removed
LatinImeTutorial.apk - keyboard tutorial when you boot, I removed it
Launcher.apk - Stock Android launcher you can remove it if you use a third party one or Touch Wiz
lcdtest.apk - removed with no issues
LiveWallpapers.apk - If you don't use them you can remove them.
LiveWallpapersPicker.apk - allows you to pick live wall papers. Remove it if you don't use it
LogsProvider.apk - DO NOT REMOVE IT. You will get force closes. This works hand in hand with DeviceManagement.apk.
Maps.apk - Google maps. Can be removed if you don't use it
MarketUpdater.apk - leave it
MediaHub.apk - included samsung app that will eventually allow movie / TV rentals, perhaps purchase. Can be removed.
MediaProvider.apk - Leave it
MediaUploader.apk - Leave it
Memo.apk - included memo app. Can be removed.
Mms.apk - If you use picture mail don't remove this. SMS might still work with some third party apps but its better to not remove this.
MobileAP.apk - This has to do with sprint tethering. Wireless tether works fine without this. Can be removed.
Music.apk - self explanatory
MusicService.apk - Leave it
MyFiles.apk - included file manager. Remove it and get a better one from the market
nascar09-prod-release.apk - Nascar, can be removed
NetworkLocation.apk - leave it
ODB.apk - leave it
OtaProvisioningService.apk - leave it
PackageInstaller.apk - leave it
Phone.apk - leave it
PhoneCrashNotifier.apk - leave it. I ran into problems removing this if my phone got force closed.
PhoneErrService.apk - leave it
PhoneInfo.apk - Leave it
PicoTts.apk - Text to speach. Google nav uses this otherwise if you don't care you can remove it.
qik_0.3.74.apk - Quik video chat, can be removed.
SamsungWidget_CalendarClock.apk - widget remove it if you don't want it. Part of touch wiz.
SamsungWidget_FeedAndUpdate.apk- widget remove it if you don't want it. Part of touch wiz.
SamsungWidget_ProgramMonitor.apk- widget remove it if you don't want it. Part of touch wiz.
SamsungWidget_StockClock.apk- widget remove it if you don't want it. Part of touch wiz.
SamsungWidget_WeatherClock.apk- widget remove it if you don't want it. Part of touch wiz.
SelectiveReset.apk - leave it
serviceModeApp.apk - leave it
Settings.apk - leave it
SettingsProvider.apk - leave it
SetupWizard.apk- I'm pretty sure this can be removed once initial set up is finished.
sfl-prod-release.apk - Sprint nfl app can be removed
shutdown.apk - removed without any issues
SisoDrmProvider.apk - leave it
SN28-1092-sprint-signed.apk - part of sprint nav can be removed
SnsAccount.apk - I believe this run sns and snsfacebook which are the backround framework for the app.
SnsProvider.apk - See SnsAccount
SoundRecorder.apk - does what it says you can remove it if you don't care
Sprint_App_Updater.apk - used for ota updates. You don't want them if you are rooted anyways so remove it.
SprintAndroidExtension.apk - removed without issues
SprintTV.apk - this can be removed if you don't use it
SprintTVWidget.apk - this can be removed
SprintZone.apk - this can be removed
StaticIP.apk - leave it
Street.apk - street view, if you don't need it you can remove it
Swype.apk - swype keyboard, you can remove this if you want to
SystemUpdater.apk - I have this on ice right now without issues. Caused my radio to restart when icing it. Fine thus far
Talk.apk - leave it
talkback_2.2.1_market.apk - leave it
TalkProvider.apk - leave it
TATLiveWallpapersDandelion.apk - if you don't want this live wall paper you can remove it
TATLiveWallpapersLuminescence.apk - if you don't want this live wall paper you can remove it
TATLiveWallpapersOceanWave.apk - if you don't want this live wall paper you can remove it
TelephonyProvider.apk - leave it
thinkdroid.apk - Can be removed, might be part of
TouchWiz30Launcher.apk - can be removed if you use a third party launcher
TouchWizCalculator.apk - you can remove it if you use a third party one or don't need it
TouchWizCalendar.apk - calendar leave it
TouchWizCalendarProvider.apk - Calendar, leave it
TtsService.apk - text to speech, google nav will use this for giving you voice directions you can remove it if that doesn't matter to you.
UserDictionaryProvider.apk - leave it
Vending.apk - leave it
VideoPlayer.apk - can be removed but no more video play back
VoiceDialer.apk - can be remove if you don't use it
VoiceSearchWithKeyboard.apk - can be removed if you don't use it
VpnServices.apk - leave it
WiBroPath.apk - leave it
WiMAX_NETEST.apk - leave it
WiMAX_RC.apk - leave it
WimaxConfig.apk - leave it
WiMAXLineTest.apk - leave it
WlanTest.apk - leave it
YouTube.apk - You tube. You can remove it but not more you tube.