GitHub

Create, manage, and discuss issues and stay up to date with an integrated news
feed for all your organizations, friends, and repositories. View your issues
dashboard to stay connected with all the issues you've reported, been assigned,
or participating in the discussion on. You can also view and filter a
repository's issue list and bookmark it for quick access.

Discover, share, and discuss code snippets using the integrated GitHub Gists
support.

Anti-feature:Network Services. GitHub.com itself runs primarily proprietary
code.