Marker is a command palette for the terminal. It lets you bookmark commands (or commands templates) and easily retreive them with the help of a real-time fuzzy matcher.
testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
These commands can tell you what key bindings you have in your bash shell by default.
a pipeable JSON parser written in Bash
automatically detects problems with sh/bash scripts and commands.
check out the "checkbashisms" script !