GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
Discover projects, groups and snippets. Share your projects with others
Code for the www.torproject.org main website
Code for https://support.torproject.org
Shared resources for building metrics-related code bases
Repository of Community portal. You can find it running in https://community.torproject.org
Scripts that help with network-health work.
Personal stem repo
Code for the Tor manual in https://tb-manual.torproject.org/
Code for https://torproject.org