Open-source alternative to HackerRank, CodeSignal, HackerEarth, LeetCode, Codility & more. Self-hosted coding exam platform with live leaderboard, ICPC scoring, Monaco editor, and Judge0 code execution. NestJS + Vue 3 + PostgreSQL.

🎬 Interview prep that actually slaps — Swipe through 1000+ tech questions. System design, algorithms, coding challenges & more. Free & open source.

A bug fix repository that can test users coding skills as a replacement to Leetcode

Moduo brings together real-time video calls, collaborative coding, and chat - a complete, modular platform for engineers to practice, conduct, or experience technical interviews like never before.

AI-powered interview prep platform with Claude as your personal professor. Structured curriculum from machine foundations to system design OAs. Open source, MIT licensed.

AI prompt workflow system for generating data structures practice problems with Claude Code