WTF : WTF is a personal information dashboard for your terminal, developed for those who spend most of their day in the command line.
It allows you to monit...
age : A simple, modern and secure encryption tool with small explicit keys, no config options, and UNIX-style composability.
Phantomas : PhantomJS-based web performance metrics collector and monitoring tool
Hurl : Hurl is a command line tool that runs HTTP requests defined in a simple plain text format.
It can chain requests, capture values and evaluate queries ...
PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.