Review Board vs Usetrace: What are the differences?
Review Board: Stress-free code review for teams of all sizes. Review Board is an open source, web-based code and document review tool built to help companies, open source projects, and other organizations keep their quality high and their bug count low; Usetrace: Web app testing system that doesn’t require coding or constant updating. Show Usetrace's artificial user how to test your web app - and she'll handle your repetitive UI testing. Usetrace doesn't require coding, and reusable modules make tests quick to create and maintain. Save your time for development while knowing that your app works after each update.
Review Board can be classified as a tool in the "Code Review" category, while Usetrace is grouped under "Browser Testing".
Review Board is an open source tool with 1.2K GitHub stars and 359 GitHub forks. Here's a link to Review Board's open source repository on GitHub.