Bookmark It - Create awesome notes on YouTube videos
GitSpo - Measure & engage your open-source community
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
Siimpl Bookmarking - Start collecting and organizing what interests you
Ruby Toolbox - Explore and compare open source Ruby libraries