For specific tutorials regarding Jailbreak, downgrading, unlock, baseband etc... follow this guide.
For specific tutorials regarding how-to basic operations like install .deb files, make a ringtone, use SSH, find IPA, restore a firmware, etc... follow this guide.

• Learn about Cydia 
• All Useful sources for Cydia
• Add a source to Cydia
• Re-install Cydia without restoring
• Clean-up Cydia
• Speed-up Cydia
• Fix defected sources

• Browse a list of Cracked apps
• Download a Pack of Cracked apps

• Browse all Free apps (with description)