GitHub

GitHub is where over 100 million developers build software together. It's the world's largest code hosting platform, combining Git version control with collaboration features that power open source and enterprise development alike. At its core, GitHub hosts Git repositories in the cloud. Push code, create branches, and merge changes with full version history. The web interface makes it easy to browse code, view diffs, and understand project history without touching the command line. Pull requests are GitHub's collaboration superpower. Propose changes, request reviews, and discuss code inline. CI/CD integrations run tests automatically. Branch protection rules ensure code quality. The merge experience handles conflicts gracefully. GitHub Actions brings automation directly into your repository. Build, test, and deploy with YAML workflows. The marketplace offers thousands of pre-built actions for common tasks. Matrix builds test across multiple environments simultaneously. Beyond code, GitHub hosts documentation (GitHub Pages), project management (Issues and Projects), package registries, and Codespaces (cloud development environments). GitHub Copilot adds AI pair programming directly in your editor. The free tier is generous - unlimited public and private repositories, 2000 CI minutes per month, and 500MB of package storage. Teams and enterprises add access controls, audit logs, and advanced security features.