ArangoDB - the multi-model NoSQL database
SPMF is an open-source data mining mining library written in Java, specialized in pattern mining.
It is distributed under the GPL v3 license.
It offers implementations of 82 data mining algorithms for:
sequential pattern mining,
association rule mining,
sequential rule mining,
SlimerJS is useful to do functional tests, page automation, network monitoring, screen capture, etc.
SlimerJS is similar to PhantomJs, except that it runs on top of Gecko, the browser engine of Mozilla Firefox (specifically, version 31), instead of Webkit, and is not yet truly headless.