SiNfuL Cydia Sources:

If you are looking for cracked apps, you should go for this repo. SiNfuL iPhone repo contains cracks of all famous Cydia apps including iFile, BiteSMS, MyWi and Multifl0w etc. Other than cracked Cydia apps, you can find tons of tweaks and mod apps

** Best Cydia Source: **

SiNfuL iPhone Repo Address: http://sinfuliphonerepo.com
Famous Apps: AndroidLock, FaceBreak, Infinidock, Install0us, iRealSMS, MyWi, Multifl0w, YourTube, AppIconReOrder, Attachment Saver, AutoSilent, BiteSMS, Chronus, Full Preview, HapticPro, iBlacklist, iBlueNova, iFile and all famous emulators including GameBoy and NES emulator.

Hackulo.us Repo (Best cydia repositorie):

Hackulo.us is the best repo for people who can't afford to buy apps from App Store. Most of people add this repo to Cydia because it has got Installous which allows you to download premium App Store apps and try them out before you may make a final purchase.

Hackulo.us Repo Address: http://cydia.hackulo.us
Famous Apps: AppSync for iOS 4.0+, Installous 4 and Crackulous

xSellize Repo:

xSellize is the best Cydia repo for those who love to play emulator games. It contains a bunch of ROM packs for Game Boy Advance, Nintendo 64 and NES emulator. In each ROM pack, you can get around 50 to 60 games which you can play on these emulators. Other than game ROMs and emulators, it has got some awesome HD themes and Bluetooth tweaks for all iPhone and iPod Touch users.

xSellize Repo Address: http://xsellize.com http://apt.xsellize.com http://cydia.xsellize.com
Famous Apps: CategoriesSB, CLASSified HD, Crimson HD, Cycorder, Cyntact, Element Mod, Elite PRO HD, ROMs and emulators etc

Insanelyi Repo:

The Insanelyi repo contains many Retina Display ready packages for your iPhone 4 and iPod Touch 4G. Other than that, you can find great tweaks and modding apps for iDevices running iOS 4.0 or above. The Insanelyi repo has got a small proportion of cracked apps as well but overall it is a nice Cydia repo for those who love to theme their iPhones and iPod Touches.

Insanelyi Repo Address: http://repo.insanelyi.com
Famous Apps: Adelis HD, AndroidLock XT, AnyRing, App Switcher (Brightness, volume and rotator), AppSync for 3.1/3.2/4.0/4.1/4.2, AttachmentSaver, Auto3G and Barrel etc

iHacksRepo:

iHacksRepo is probably the best Cydia source for iPhone 4 and iPod Touch 4G users. It has almost all essential tweaks and mods which you will find in xSellize and SiNfuL iPhone repo. It has got an awesome collection of game ROMs, emulators, HD themes and other must have mods which you can try on any iDevice jailbroken on iOS 4.0 or above.

iHacksRepo Address: http://ihacksrepo.com
Famous Apps: FolderEnhancer, FoldersInFolders, FreeSync, FullScreen for Safari, Gingerbread HD, GPower Pro, Graviboard, GridTab for Safari, Infiniboard, Infinidock, Inifinifolders, Instant Mirror, Auto3G, Frash, FaceBreak, iClassic, iFile and YourTube HD etc

HackYouriPhone Repo:

HackYouriPhone repo is basically an Italian Cydia source which is full of great themes, animated lockscreens and tweaks which you can try on your iPhone, iPod Touch and iPad. There are plenty of lockscreen mods and HD themes available in this source for iPhone 4 and iPod Touch 4G users.

HackYouriPhone Address: http://repo.hackyouriphone.org
Famous Apps: AndroidLock, App Switcher Brightness, AppSync, Auto Shutdown, Auto Silent, Backgrounder, Black'UPS Darkness HD, 3G Unrestrictor, CallClear, CallLock, CameraButtons, iFake, iSHSHit and LockInfo plugins.

BiteYourApple Repo:

BiteYourApple repo is another great Cydia source with tons of great themes, ringtones and mods for all iDevices. If you want to add Hackulo.us, go for this source because it contains all packages of Hackulo.us source as well as tons of other interesting Cydia apps.

BiteYourApple Address: http://repo.biteyourapple.net
Famous Apps: Wifi Sync, Folder Enhancer, Frash Toggle, zToggle, Full Screen for Safari, Gridlock, Home Page in Safari, GroupSMS, Insomnia Pro and Inspell app etc

iPhoneCake Repo:

Just like Hackulo.us is used to install Installous app, iPhoneCake repo is used to install AppCake app. Installous and AppCake, both works in a same way but what's cool about AppCake app is that it not only allows you to download and try premium App Store apps but also allows you to access and download cracked Cydia apps at the same time. iPhoneCake repo has its own official website which allows you to search and download all kinds of free and premium App Store apps directly to your computer. Once downloaded, you can install the downloaded apps (.IPA) via iTunes.

iPhoneCake Repo Address: http://cydia.iphonecake.com
Famous Apps: Asphalt 5, FIFA '11,Street Fighter IV, Angry Birds, Safari Download Manager, GTA: Chinatown Wars, iSteamy, The Settlers, TVUPlayer, NFS Shift and many more.

YourCydiaRepo:

You will hardly find any theme, wallpaper or soundboard on this repo but you can find almost all tweaks and mod apps you can think of. There is no cracked app in this repo, so you will either find completely free or paid apps. Overall its a great source for those who are interested in tweaking their iPhone and iPod Touch with some cool Cydia hacks.

YourCydiaRepo Address: http://yourcydiarepo.org
Famous Apps: PwnTunes, MobileTerminal, SBRotator, biteSMS, Infiniboard, Infinidock, iSilent and many more.
Status: Currently Unavailable.

P0dulo Cydia Source:

Not many of you must have heard the name of this repo but believe me, this is the repo where you can find anything. At P0dulo repo, you will find tons of themes, ringtones, tweaks and a lot of games.

P0dulo Address: http://podulo.com http://p0dulo.com
Famous Apps: Infinidock, Infiniboard
[Thanks to Stephanie & Tsparkz for the updates]