Random docs.
Cheat-sheets, manpages, notes, infographics.
Use them, if you'd like. You could do something like: git clone https://github.com/zacanger/doc.git ~/doc so that they'd always be around.
This isn't maintained, so docs for active projects (like React) may be out of date.
All docs are under the MIT License unless otherwise noted, so feel free to copy them around as long as you include the notice.