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.
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 ...
wuzz : Interactive cli tool for HTTP inspection
Wuzz command line arguments are similar to cURL's arguments, so it can be used to inspect/modify requests cop...
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
ESBench : Shareable JavaScript Benchmarking
Built-in ES2015 support, powered by Babel
Statistically significant benchmarks, powered by Benchmark.js
Grunt is a task-based command line build tool for JavaScript projects