The Toolsmiths gamedev tools
This website is the public face of an online Slack community for game tools development. It was mainly bourne out of the Game Developers Conference Technical Issues in Tools roundtables which are held annually in San Francisco. If you work on game development tools (or are a student/enthusiast) you can get an invite by tweeting to @thetoolsmiths.
Part of the online community is also from the IGDA Tools SIG. That organization is dormant/defunct at the moment, but in the past they organized a lot of blog content. That content is archived here. It remains to be seen who wants to contribute new content to this site. If you are interested join the slack and let us know in #website (in the Slack channel)!