Cydia only has a certain amount of applications when you first install it. The way that you add more applications is by adding more repositories, which are simply web addresses that you send Cydia to gather application information in order to install things. These Cydia repositories are numerous, and can be quite overwhelming if you don't know what you're looking for. It is for this reason that I am giving you a guide to Cydia repositories.
To begin, I will tell you
how to add a Cydia repository.
First, open up Cydia.
Next, click on the middle button that says 'Sources.'
After that, select 'Edit' in the top right corner, then 'Add' in the top left.
Choose a Source URL from the list below, enter it in to the box, and select 'Add Source.'
Then, you can select the source in order to see what applications that repository has to offer. In addition to that, the apps from the repository will be added to the main list of apps in Cydia.
Here's a large list of repositories, some of which you may already have. I'll keep updating it as I discover more and more repositories. Feel free to recommend some to me, as well.:
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.
