htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
HTTPie : HTTPie—aitch-tee-tee-pie—is a command line HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, and more
csscss : csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
pass : pass is a very simple password store that keeps passwords inside gpg2 encrypted files inside a simple directory tree residing at ~/.password-store. Th...