The free Tunity Intranet Portal provides a private, shared company home page allowing you to maximise your communications and streamline your business operations.
Features:

Shared or private tasks / events
Manage and prioritise tasks. Create an manage a calendar of events. Keep track of staff and colleagues' progress.
Messaging
Leave and share messages. Brainstorm with your colleagues. View and search an archive of all of your messages.
Shared or private links
Share links to clients', competitors' and other relevant web-sites.
Shared or private files and resources
Keep all of your important shared files, agendas, documents in one unified place either shared with your colleagues or private for your access only.
Stay up to date
Keep up to date with all the relevant news and comment within your industry.
Multiple applications
Create as many portals as you need: For projects, groups, departments or company-wide.
Access anywhere
Access your intranet portal from anywhere in the world and work remotely.
"The Tunity Intranet Portal has been great for us. It's one of those invaluable tools that makes running our business that little bit easier."- Russell Pooley, Director, Web Methods Ltd