Long story short, I had big plans for developing Programming.io into a cruft-free social bookmarking service for developers, but other projects are making that impossible.
It could obviously be made into anything related to programming (tutorials, mentoring or freelance marketplace, Q&A format forum, etc.)
If you're interested, you can check out the auction here (ends in 2 days): https://flippa.com/10635953-programming-io