Twitter4R v0.2.0 now provides 100% Twitter REST API coverage for Ruby. This is the open source project providing Ruby bindings for the Twitter REST API. Most appropriate for pure Ruby and Ruby on Rails projects.
Codeacademy has just launched its program for APIs for open release. The well known Codecademy is a team of hackers working hard to build a better way for anyone to teach, and learn, how to code. Their investors have been Union Square Ventures, Index Ventures, Kleiner Perkins, O'Reilly, SV Angel, Thrive Capital, CrunchFund, Collaborative Fund, Founder Collective, Yuri Milner, Vivi Nevo, Richard Branson, and several others.