TACIT: New open-source text analysis, crawling, and interpretation tool (tacit.usc.edu)

Quite an interesting tool, and I look forward to pointing it in different directions and throwing some scenarios at it in ways that might make for a constructive article or essay.

Cool, but badly in need of some case studies or examples. I'm moderately familiar with this kind of thing down to the algorithmic level but I found this site to be the opposite of user-friendly.

Might just be me, but I'm stuck in a Catch-22 between being asked to read the ToS before signing up, and being asked to sign up before reading the ToS.

Very interesting but the site is light on details.

What are other open-source packages that do this kind of thing?