Embold.io - Peer Code Review
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Hibari - Hibari is a simple yet powerful Mac Twitter app that blocks unwanted tweets and combines important tweets into a single timeline.
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.
Daisy - Get help creating healthier and more productive habits
ReSharper - ReSharper is a productivity tool for visual studio that provides tools and features to help you manage your code.