Why Jailbreak: Get Even More Stuff With Repositories
BigBoss & Planet-iPhones Applications, Utilities, and Themes http://apt.bigboss.us.com/repofiles/cydia/
iSpazio Mostly Themes, with some utilities http://ispaziorepository.com/
miPhone Themes and Tweaks http://cydia.miphone.ca/repo/
ModMyi.com Tons of everything: games, utilities, themes, etc. http://apt.modmyi.com/
Darvens Repository Themes, Tweaks, Apps, and Wallpapers http://apt.guardiansofchaos.com
Xsellize Backgrounds, Games, Apps, and Themes http://xsellize.com/cydia/
Hackulous Hacks http://cydia.hackulo.us/
Hack&Dev Utilities and Tweaks http://iphone.hackndev.org/apt/
iPhoneStuff Customization Apps and Utilities http://iphonestuff.ru/
SaladSoft http://nickplee.com/cydiasource/
UrbanFanatics.com http://urbanfanatics.com/cydia/
Ranbee Utilities and Customization http://ranbee.com/repo/ Another way that you can add Cydia repositories is through packages. Select 'Sections' at the bottom of Cydia.
Next, click on 'Repositories.' From the list, you can install any repositories that take your fancy just as you would install any other application.