The Piwik Ruby SDK by Piwik allows to access the API for analytic development purposes. Features include full API implementation, Piwik-terminal binary, and MRI Jruby compatibility. By Matthieu Napoli.
If you're reading this, I probably don't have to tell you about Freshmeat. This repository of open source code and projects has been around quite a while, and is used by a number of prominent projects. What you may not know, however, is that Freshmeat offers a well-designed Freshmeat API to help developers access the data on Freshmeat for any purpose that makes sense.
PipelineDB recently announced Stride, a realtime analytics API. API access to powerful analytics engines delivers the potential for computers to replace the role of the data scientist. PipelineDB President, Jeff Ferguson, believes Machines Analytics may turn this potential into reality.