HPCC is the big data analysis tool from LexisNexis. They have proprietary add-ons as well. They've got a meetup and have spoken at local users' groups. I don't see any upcoming meetups, but keep an eye on them.
This was the note from Trish, their program manager:
Hello, I am the Program Manager for the HPCC Systems open source project at LexisNexis. HPCC Systems (www.hpccsystems.com) from LexisNexis Risk Solutions offers a proven, data-intensive supercomputing platform designed for the enterprise to process and solve Big Data analytical problems. As an alternative to legacy technology, HPCC Systems offers a consistent data-centric programming language, two processing platforms and a single, complete end-to-end architecture for efficient processing. And it is open source! ... I'm happy to provide whitepapers, articles or any other information needed.