First we need to define the word "team." Easy way is to use the org-chart. The hard way is all active projects within an org-chart team and cross org-chart team.
Org chart:
- TechOps - Bugzilla & RT
- Analytics - Bugzilla & Scrumbugz
- MediaWiki Core - Bugzilla & MW
- Engineering Community Team - Bugzilla & MW & fab.wmflabs
- Release Engineering - Bugzilla & MW & fab.wmflabs
- Multimedia - Bugzilla & Mingle
- Core Features - Bugzilla & Trello
- Growth - Bugzilla & Trello
- Editing - Bugzilla
- Parsoid - Bugzilla
- Fundraising - Bugzilla (minimally) & Mingle
- Language - Bugzilla & Mingle
- Mobile Web - Bugzilla & Trello
- Mobile App - Bugzilla & Trello & OTRS
- Zero - Trello (according to Yuri tonight) & (minimally) Bugzilla