GitLab Community Edition
GitLab is open source software to collaborate on code.
Manage git repositories with fine-grained access controls that keep your code secure.
Perform code reviews and enhance collaboration with merge requests.
Each project can also have an issue tracker and a wiki.
Used by more than 100,000 organizations, GitLab is the most popular solution to manage git repositories on-premises.
Read more about GitLab at about.gitlab.com.
Documentation
User documentation
- API Automate GitLab via a simple and powerful API.
 - 
CI GitLab Continuous Integration (CI) getting started, 
.gitlab-ci.ymloptions, and examples. - GitLab as OAuth2 authentication service provider. It allows you to login to other applications from GitLab.
 - GitLab Basics Find step by step how to start working on your commandline and on GitLab.
 - Importing to GitLab.
 - Markdown GitLab's advanced formatting system.
 - Migrating from SVN Convert a SVN repository to Git and GitLab
 - Permissions Learn what each role in a project (external/guest/reporter/developer/master/owner) can do.
 - Profile Settings
 - Project Services Integrate a project with external services, such as CI and chat.
 - Public access Learn how you can allow public and internal access to projects.
 - Container Registry Learn how to use GitLab Container Registry.
 - SSH Setup your ssh keys and deploy keys for secure access to your projects.
 - Webhooks Let GitLab notify you when new code has been pushed to your project.
 - Workflow Using GitLab functionality and importing projects from GitHub and SVN.
 
Administrator documentation
- Authentication/Authorization Configure external authentication with LDAP, SAML, CAS and additional Omniauth providers.
 - Custom git hooks Custom git hooks (on the filesystem) for when webhooks aren't enough.
 - Install Requirements, directory structures and installation from source.
 - Restart GitLab Learn how to restart GitLab and its components
 - Integration How to integrate with systems such as JIRA, Redmine, Twitter.
 - Issue closing Customize how to close an issue from commit messages.
 - Libravatar Use Libravatar for user avatars.
 - Log system Log system.
 - Environment Variables to configure GitLab.
 - Operations Keeping GitLab up and running
 - Raketasks Backups, maintenance, automatic webhook setup and the importing of projects.
 - Repository checks Periodic Git repository checks
 - Security Learn what you can do to further secure your GitLab instance.
 - System hooks Notifications when users, projects and keys are changed.
 - Update Update guides to upgrade your installation.
 - Welcome message Add a custom welcome message to the sign-in page.
 - Reply by email Allow users to comment on issues and merge requests by replying to notification emails.
 - Migrate GitLab CI to CE/EE Follow this guide to migrate your existing GitLab CI data to GitLab CE/EE.
 - Git LFS configuration
 - Housekeeping Keep your Git repository tidy and fast.
 - GitLab Performance Monitoring Configure GitLab and InfluxDB for measuring performance metrics
 - Monitoring uptime Check the server status using the health check endpoint
 - Sidekiq Troubleshooting Debug when Sidekiq appears hung and is not processing jobs
 - High Availability Configure multiple servers for scaling or high availability
 - Container Registry Configure Docker Registry with GitLab
 
Contributor documentation
- Documentation styleguide Use this styleguide if you are contributing to documentation.
 - Development Explains the architecture and the guidelines for shell commands.
 - Legal Contributor license agreements.