The British intelligence and security organization Government Communications Headquarters (GCHQ) is known for its surveillance programs and how it dealt with The Guardian in the Edward Snowden case. But like any intelligent government agency they use a lot of open source and work with the open source community. The agency recently released its internal software as an open source project called Gaffer.
The project is released under the Apache Licence. Its GitHub page explains that "Gaffer is a framework that makes it easy to store large-scale graphs in which the nodes and edges have statistics such as counts, histograms and sketches. These statistics summarise the properties of the nodes and edges over time windows, and they can be dynamically updated over time.”
Not a big story, but certainly an interesting one.