ADR Tools : A command-line tool for working with Architecture Decision Records (ADRs).
how2 : stackoverflow from the terminal.
how2 finds the simplest way to do something in a unix shell. It's like man, but you can query it in natural language.
docopt : Command-line interface description language
howdoi : Instant coding answers via the command line.
PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.
The TLDR pages are a community effort to simplify the beloved man pages with practical examples.