Cydia - An alternative app store for jailbroken devices.
Startup Toolkit - Interactive how-to guides to launch your startup
iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!
Lative - Increase your growth efficiency with real-time data
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
HVAC Toolkit - HVAC ToolKit is an easy-to-use app to assist engineers.