Installer - Installer is a package manager build specifically for iOS. Older versions of Installer are Open Source
Startup Toolkit - Interactive how-to guides to launch your startup
Cydia - An alternative app store for jailbroken devices.
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship
iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!
App Launch Checklist - Planning tool for launching your app successfully