It’s like to hackterms but opensource. I found myself having to look up some terms and not finding them on wikipedia. When I finally find the meaning, I add to my own personal dictionary and rarely hackterms, because contributing to a closed-source project that might just someday disappear seems wrong.
Not very clear what you’re looking for, but the https://en.m.wikipedia.org/wiki/Jargon_File is in the public domain so you could use it as a basis for a collaborative project, or maybe someone has already done that…