WikiTech
From Freephile Wiki
The WikiTech wiki at https://wikitech.wikimedia.org/wiki/Main_Page is really a wonderful resource to the Free Software Community. (And there are others like the Mozilla Foundation's Developer Network https://developer.mozilla.org/en-US/)
I have no intention of duplicating the knowledge and effort there. Instead, I want to link to it, and perhaps distill or expand on content there as warranted. For example, to become more involved with the WikiMedia Foundation (WMF) and projects it's important to be aware of and participate in things like the Tool Forge (formerly Tool Labs)