CodeFactor.io
Codacy
CodeClimate
SonarQube
SensioLabs Insight
Source-Navigator NG
ESLint
Source Insight
Cambly
Duolingo
Italki
Drops
Lingualia
Busuu
Babbel
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CodeFactor.io
CamblyCodacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
CodeClimate - Code Climate provides automated code review for your apps, letting you fix quality and security issues before they hit production. We check every commit, branch and pull request for changes in quality and potential vulnerabilities.
Italki - italki is a language learning social network that connects students and language teachers.
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Drops - Visual language learning.