Cydia - An alternative app store for jailbroken devices.
GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.
AppRecs - AppRecs sorts through reviews in the App Store and automatically helps you filter out inauthentic results.
NanoReview - Most advanced CPU and SoC comparison
Fnd - Browse Apple App Store and iTunes on the Web
Productz.com - Crowdsourced products database