JavaScript Tools

JS Utilities:

• accounting.js
• async
• axios
• chance
• date-fns
• format.js
• immutable
• is.js
• lodash
  • You-Dont-Need-Lodash-Underscore
• Luxon
• Math.js
• Moment.js
• Numeral.js
• Ramda
• RxJS
• string.js
• voca
• wait
• xregexp.com

Transpiling / Type Checking (ES to ES):

• Babel
• TypeScript
• Flow

Code-analysis Engine:

• Tern

Linting/Hinting & Style Linter:

• eslint

Unit Testing:

• AVA
• Jasmine
• Mocha
• Tape

Testing Assertions for Unit Testing:

• Chai
• expect.js
• should.js

Test Spies, Stubs, and Mocks for Unit Testing:

• sinon.js
• Kakapo.js

Code Formater/Beautifier:

• esformatter
• js-beautify
• jsfmt
• prettier

Performance Testing:

• benchmark.js
• jsperf.com

Visualization, Static Analysis, Complexity, Coverage Tools:

• Coveralls [$]
• Esprima
• istanbul

Optimizer:

• Closure Compiler
• UglifyJS 2
• optimize-js
• Prepack

Obfuscate:

• Javascript Obfuscator [free to $]
• JScrambler [$]

Sharable/Runnable Code Editors:

• jsbin.com [free to $]
• jsfiddle.net

Online Regular Expression Editors/Visual Tools:

• debuggex
• regex101
• regexper
• RegExr

Authoring Convention Tools:

• Airbnb's ESLint config, following our styleguide
• Standard - ESLint Shareable Config

Trending JS Repositories on GitHub This Month:

https://github.com/trending?l=javascript&since=monthly

Most Depended upon Packages on NPM:

https://www.npmjs.com/browse/depended