TUTOS is a tool to manage the the organizational needs of small groups, teams, departments ...
To do this it provides some web-based tools:

a calendar for users and groups (incl. screenshot)
Groups / Teams
address manager for people, companies and departments (incl. screenshot)
bug tracking system (incl. screenshot)
product/project repository (incl. screenshot)
with task management (incl. screenshot)
with document management (incl. screenshot)
with installation management (incl. screenshot)
support of different roles (manager,developer,customer etc.)
support of relations to other projects (base product, subproject etc.)
mailboxes (imap/pop)
timetracking on projects, installations and bugs
Invoices
Watchlists. Stay informed on changes on projects/bugs etc via email.
support for teams that are distributed over different timezones
color themes / layout
fine grained permission handling
change history