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
Flow : Adds static typing to JavaScript to improve developer productivity and code quality.
tracing-framework : Rich tools for instrumenting, analyzing, and visualizing web apps.
ESLint : The pluggable linting utility for JavaScript and JSX
Grunt is a task-based command line build tool for JavaScript projects