Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
AppShopper - Mac Apps, Mac App Store, iPad, iPhone and iPod touch app store listings, news, and price drops
ActiveWords - Auto correct on steroids
AppAgg - Application Aggregator
Zeplin - Collaboration app for UI designers & frontend developers
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.