Splunk has a free version of their system but it has a variety of limitations. The transforms I publish use either local resources or third party APIs and the only limits are those imposed by the API providers themselves. You get very limited access to the Maltego community transform server and you have to solve a captcha every three days in order to continue using the system. If that's too steep for you the following will work: Maltego costs $650 and the minimum Splunk license is $5,000. I am new to Python, but it seems to be the language to use for the set of problems I enjoy solving.
Python is the favored tool of the guys from Paterva, Splunk is written in it as well as many of the free Splunkbase apps, and the Natural Language Tool Kit project uses it, too. The other tool I use heavily is Splunk, which is an enterprise grade datacenter logging application. This repository is a collection of things I have written for use with Paterva's Maltego OSINT & forensics application.
