Installer Sources

Community Sources

AppTapp Official: repository.apptapp.com
BigBoss: thebigboss.org/repo.xml
iSpazio repo.ispazio.net
ModMyiFone: modmyifone.com/installer.xml
RiP Dev: repository.ripdev.com
Ste Packaging: repo.smxy.org/iphone-apps

All of The Others

aka.Repository: akamatsu.org/repo.xml
AlliPodHax: ihackz.com/index.xml (Install All Sources)
AlohaSoft: (Aqwoah theme available after donation)
Apogee LTD: apogeeltd.com
BigBoss Beta: thebigboss.org/repobeta.xml (BigBoss' beta stuff)
Byooi Digicide: byooi.com/iphone/digicide.plist (Jiggy Apps)
BlackWolf m8an.de/ownrisk.xml (Extended Preferences, use at your own risk.)
Caissa: caissa.us (Caissa native chess)
CedSoft: prog.cedsoft.free.fr (iSnake/Bounce)
Chris Miles: iphone.rustyredwagon.com/repo (iSolitaire, iSlots, iCrossword)
Code Genocide (Adults Only): repo.codegenocide.com (iSteamy)
Conceited Software: conceitedsoftware.com/iphone
CopyCoders: homepage.mac.com/hartsteins/copycoders/copycoders.xml (Network Apps)
Death to Design: iphone.deathtodesign.com
Dlubbat: www.dlubbat.com/iphone.xml (TextTwist)
Earth3D: s.imov.eu (Earth3D, 3D representation of the earth)
Fight Club: dezign999.com/repo
Hijinks Inc.: i.hijinksinc.com (Themes for the iPod touch and iPhone)
Gogosoft: www.blackblack.org/gogobeta.plist (NetChess)
iApp-a-Day: iappaday.com/install
iClarified: installer.iclarified.com
iJailbreak: ijailbreak.com/repo.plist
iPlayful: iplayful.com/r (Snake)
iPodTouchMaster: ipodtouchmaster.com/files/repo.xml (1.1.3/4 Jailbreak & iPhone Apps For 1.1.1/2/3/4)
iPhoneDevDocs: idevdocs.com/install
iPhoneSurge: iphonesurge.com/installer.xml
iPhone Recorder: iphone-recorder.com/install
iPhone Video Recorder: iphonevideorecorder.com/install
iThemes: imagine09.com/IndexAE.xml
iSwitcher: www.meachware.com/list.xml
iUnlock: i.unlock.no
iWorld: iappcat.com/r/31235
Jmiz9000: Jmiz9000.techdocrx.com/repo.xml
Limited Edition iPhone: limitededitioniphone.com/lei.xml
Marco Giorgini: marcogiorgini.com/iPhone/plist.xml (Yeti3D, Pac3D)
Mateo: bblk.net/iphone (BeatPhone)
MNPlight: movenplay.gforge.inria.fr/iphone (MoveNPlay Client, Manage iTunes, contacts and so forth)
Mobile Stacks: mobilestack.googlecode.com/svn/repository/internal.plist
Moyashi: hpcgi3.nifty.com/moyashi/ipodtouch/repository.cgi
MTL: home.mike.tl/iphone
New Att iPhone: newattiphone.com/repo.xml (Tetris, Penguin Panic)
Niffob: niffob.com/triphone.xml (Themes and more)
Nuclear Design: nucleardesign.net/repository
PBF: polarbearfarm.com/repo (Showtime Video Recorder)
peeInMyPantz potty: potty.peeinmypantz.com (Guide to Singapore Public Transport)
Pyrofer's Projects: pyrofersprojects.com/repos/repos.xml
R4m0n: iphone.r4m0n.net/repos (iPhysics)
Robota Softwarehouse: iphone.robota.nl (Chess, Screenshot, iGo, iSpit, iLevel, Sysinfo)
scummVM: urbanfanatics.com/scummvm.xml
Shai's Apps: ride4.org/shai.xml (Customize Addons, and install over 70 sources)
ShopList: mazinger.cs.yale.edu/iphone-apps/index.xml (ShopList)
Simek's Graphic: simek.ddl2.pl
SimPort: install.ifon.no (Import contacts directly off your SIM card to iPhone)
Skrew: i.danstaface.net (iToday, vWallpaper, Skrew Common)
SNES: frankssnesroms.890m.com/REPO/snesroms.xml (SNES Emulator)
SoSsiPhone: rep.sosiphone.com (ContactFlow)
SpoofApp: www.SpoofApp.com/source (CallerID Spoofing)
Studded: studded.net/installer/index.xml
Swell: lyndellwiggins.com/installer/Swell
Swirlyspace:swirlyspace.com/SwirlySpace.xml
Touch Fans: touchrepo.com/betarepo.xml
Touchmod Team: touchmods.net/rep.xml (Sip client for the iTouch)
weiPhone: app.weiphone.com/installer (weTools/weDict)
Wizdom on Wheels: iphoneapps.wizdomonwheels.com (Common website links)
Zodttd: zodttd.com/repo (Gameboy advance, openttd and psx4all)

Languages

Arabic: apps.iphoneislam.com
Chinese: iphone.org.hk/repository.plist
Danish: iphone.vildmedmac.dk/install
FrenchIphone: rep.frenchiphone.com
German: sendowski.de/iphone
Greek: greek-iphone.com/grloc
Hebrew עברית: ihebrew.net
Norwegian - iFon: install.ifon.no
Persian: s.myiphone.ir
Polish - iPolish(1.1.2/3/4): i.myapple.pl/repo
Português-Brasil(1.1.2): iphonemod.com.br/forum/repo/installer.xml
Russian iPhone по-русски russianiphone.ru/beta
Russian Tools (in English) russianiphone.ru/beta/en
Spanish Phyros iPhone-ES: iphone.frickr.es/index.xml
Swedish iFun: ifun.se/swe
Taiwan: iphone4.tw/showme (SummerBoard Themes)
Taiwanese: iphone4.tw/unlock
Thai: pradt.net/iphone
Thai: www.smart-mobile.com/beta
Türkçe: niffob.com/triphone.xml
Vietnamese: iphone.billydragon.net

Inactive (for reference)

HighTymes: hightymes.org/iphone/plist/index.xml
Loring Studios: loringstudios.com/iPhone-schnapps/index.xml
iBlackjack: patrickmccarron.com/irepo
TheLuiz: theluiz.com/repo.xml