Ruby

brakeman

Find security vulnerabilities in your Rails code.
Ruby

bundler-audit

Audit your Gemfile for known vulnerabilities and insecure sources.
Ruby

bundler-outdated

Track outdated Ruby gems.
Coffeescript

coffeelint

Ensure consistent style in your CoffeeScript code.
Unknown

comment

Keep track of TODO/HACK style comments in your code.
Bower

constable

Track outdated Bower dependencies.
Unknown

coverage

Track your project's test coverage.
Css3

csslint

Ensure consistent style in your CSS.
Javascript

depcheck

Identify unused dependencies in your Node projects.
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eclint

Track EditorConfig violations and errors.
Javascript

escomplex

Track the complexity of your JavaScript code.
Javascript

eslint

Identify common style and maintainability issues in your JavaScript code.
Git

git

Make use of Git based data including commit messages, author, and sha.
Haskell

hlint

Identify common style and maintainability issues in your Haskell code.
Html5

htmllint

Identify common style and maintainability issues in your HTML files.
Javascript

jshint

Identify common style and maintainability issues in your JavaScript code.
Javascript

license

Track and lock down your dependency licenses.
Javascript

ncu

Track outdated npm dependencies.
Javascript

nsp

Track Node security alerts.
Php

phpmd

Identify common style and maintainability issues in your PHP code.
Ruby

rails-best-practices

Identify common style and maintainability issues in your Rails code.
Ruby

reek

Identify common style and maintainability issues in your Ruby code.
Javascript

retire

Identify vulnerabilities in your JavaScript libraries.
Ruby

rubocop

Identify common style and maintainability issues in your Ruby code.
Ruby

rubycritic

Lint your Ruby code, identify similar methods, and calculate code churn.
Sass

sass-lint

Identify common style and maintainability issues in your Sass files.
Scala

scalastyle

Identify common style and maintainability issues in your Scala code.
Sass

scss-lint

Identify common style and maintainability issues in your Sass files.
Slim

slim-lint

Identify common style and maintainability issues in your Slim templates.
Unknown

stat

Track various code statistics including lines/loc, comments, language, and size.
Javascript

synt

Find similar functions and classes in your TypeScript/JavaScript code.
Swift

tailor

Identify common style and maintainability issues in your Swift code.
Typescript

tslint

Identify errors and common style/maintainability issues in your TypeScript code.