My Favorites:
General:
- Better editor WYSIWYG: http://trac-hacks.org/wiki/TracWysiwygPlugin
- TicketCalendar Macro: http://trac-hacks.org/wiki/WikiTicketCalendarMacro
- AccountManager: http://trac-hacks.org/wiki/AccountManagerPlugin
Scrum
- Agilo: http://trac-hacks.org/wiki/AgiloForScrumPlugin
This is the place to watch http://trac-hacks.org/
