CN Global offers implementation services on open source online collaboration applications. 

eGroupWare is a multi-user, web-based groupware suite wil run on Windows, Mac, and Linux Server that integrate with variety of SQL-based databases as well, including MySQL, PostgreSQL, and MSSQL. Currently available modules include: email, address book, calendar, infolog (notes, to-dos, phone calls), content management, forum, bookmarks and wiki. It's suitable for enterprise intranet or can be configure for extranet for both internal and external collaboration.

PhpCollab, is another open-source internet-enabled collaboration workspace for project teams. Modeled on Macromedia Sitespring, phpCollab architecture allows for the consulting team to share information with each other in one space and publish that information, when desired, to another space for the client. phpCollab encompasses the most important aspects of project management, such as task planning and document sharing, and hooks into other open source applications for bug tracking and content management: 

ADMINISTRATION: 
Deployment: allows for flexibility with firewalls and intranets 
Updates: automatic system updates to the latest available version 
Themes: availability of interface themes 
Permissions: permission for different types of users 
Logs: track user activity 
Database: backup data 
Settings: manage system settings such as default language and file size allowance 

PROJECT TEAM: 
Team/Client: 2 distinct sites - one for project team information and one for client team information 
Notifications: automated notifications of project changes and events through email 
Project Lifecycle: customizable organization (through phases, tasks, and subtasks) 
Planning: manage assignments, monitor task status, track estimate vs actual work 
Graphical View: JPGraph graphically maps task progress 
Scope Creep: automatic display of difference between project estimates and recorded actuals 
Documents: file storage, versioning, peer reviews 
Support: manage and respond to support requests 
Bug Tracking: manage software issues through integrated Mantis 
Discussions: open and post to a project bulletin board 
Notes: record miscellaneous project information 
Reports: produce project statistics 
Calendar: visually track assignments and add milestones and recurring project events 
Bookmarks: record and share important web site addresses 
Search: search system on keyword basis 
Export: save project file as a CSV 

CLIENT TEAM: 
Tasks: view existing and post new tasks 
Documents: upload new files, approve or edit existing documents 
Bulletin Board: open new and contribute to discussions 
Support: file support requests and view responses