Linux man-pages
The Linux man-pages project documents the Linux kernel and C library interfaces that are employed by user-space programs. This package contains over 1,900 man pages.
bropages
bro pages are concise examples of using command line programs
Kommandr
Kommandr had a simple yet ambitious charter: be a social application that enables users to discover, learn about, save, and sh ...
cheat
Cheat allows you to create and view interactive cheatsheets on the command-line. It was designed to help remind *nix system ad ...
TLDR pages
Simplified and community-driven man pages