Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free

Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.

SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.

Twitterrific - Twitterific is an app that offers several functions and fun features for your Twitter account.

ReSharper - ReSharper is a productivity tool for visual studio that provides tools and features to help you manage your code.

TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.