There have been many Cydia alternatives which have never had much success over the past 5 years of jailbreaking the iPhone (and iPad). Most every tweak has transitioned from Icy, Installer or Rock Your Phone over to Cydia. With an early preview, iTweak is looking to become yet another "Cydia alternative" for jailbreakers to locate themes, utilities and other great tweaks.
The iTweakStore.com has been launched with:
Welcome to iTweak! iTweak is one of the best places to get all of your Tweaks, Themes, Utilities and more on your jailbroken iPhone, iPod touch and iPad! We serve as an alternative to Cydia, and the Apple App Store.