scavenger is a multi-threaded post-exploitation scanning tool for scavenging systems, finding most frequently used files and folders as well as "interesting" files containing sensitive information.
Web mining module for Python, with tools for scraping, natural language processing, machine learning, network analysis and visualization.
David MacKay has put the textbook he wrote online for everyone to download in a variety of formats. If you find it useful, consider buying a copy.
A FOSS platform for analysing and visualizing large sets of documents. Designed with investigative journalists in mind but has other uses. Has a plugin system. Can be run as a server or locally (https://github.com/overview/overview-local). Designed to run as a docker container (bluh) but running it as-is shouldn't be difficult. Written in scala (wtf?) Seems to use postgres as its back-end.