Most Useful Apps from Cydia

My Cydia selection:

1. OpenSSH
   allows you to access your iPhone filesystem remotely, you should change password for root and mobile users as soon as possible after installing it
   
2. Mobile Substrate
   allows to hook functionality into existing application, eg. make VoIP calls from Skype on 3g
   
3. VoIPover3G
   relays on Mobile Substrate, tricks applications into using VoIP over 3g, eg. Skype
4. CyDelete
   allows to delete Cydia apps directly from SpringBoard just like AppStore apps
5. Siphon
   VoIP SIP client for iPhone, works fine with voipdiscount.com