Good Code
Frontend Mentor
Real Dev
hackattic
Frontloops
HackerRank
Takehome
LeetCode
CodeFactor.io
Codacy
SonarQube
CodeClimate
ESLint
SensioLabs Insight
Source Insight
Source-Navigator NG
Good Code CodeFactor.ioBased on our record, Good Code seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Haven't tried this yet bit I have goodcode bookmarked. I think I discovered it via a subreddit before. Source: about 3 years ago
Frontend Mentor - Supercharge your front-end skills by building in a real-life workflow. Solve real-world HTML, CSS and JavaScript challenges whilst working to professional quality designs.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
Real Dev - Real-life coding skill challenge
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.
hackattic - No nonsense, real world programming challenges
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.