Open HUB is described as 'Explore a rich directory of open source projects, claim your contributions, and manage project data with real-time metrics and user-driven updates' and is a popular App Discovery service in the online services category. There are more than 50 alternatives to Open HUB, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Android apps. The best Open HUB alternative is AlternativeTo, which is free. Other great sites and apps similar to Open HUB are Product Hunt, OSS Gallery, Slant and FileHippo.