What is Cydia?

I installed something, but there is no app icon for it. Where is it?

Can I filter Changes to only show my favorite types of packages?

If I get a new device, can I reinstall products I have purchased?

I keep getting stuck in Safe Mode!

How do I keep my device safe and using minimal battery?

How do I fix these annoying errors that pop up while using Cydia?

If I use Apple's Reset All Settings, why does my device not boot?

What are repositories?

Why are there ads in Cydia?

How do I make a repository to host and share packages I made?

How do I ask one of the default repositories to host my package?

I uninstalled a default repository. How I do reinstall it?

Notes on compiling, toolchain, codesign, and setuid issues

Cydia on Wikipedia

iOS jailbreaking on Wikipedia