talk.RulesAsCode.com
talk.RulesAsCode.com is a discourse site that I set up with the help of Jameson Dempsey of Legal Hackers. It is a web forum, knowledge base, and mailing list for people working on digitized legislation, regulation, and contract, particularly people doing it in the public sphere.
When I learn about cool tools, I try to remember to add to the knowledge base there.