Our intranet solution is based on Drupal that has group spaces to allow different teams to have their own conversations. There are six default features - a blog, a wiki, a calendar, a to do list, a shoutbox, and a dashboard to manage it all. Additionally we have implementations of Mind-Maps, Question & Answers, Semantic Filters, Research Bookmarklet, Invoices, ...

 

Atrium blog
 
Blog: The blog feature for each group has well known functions like commenting, file attachments on the post and the comments with granular notifications per user.
Atrium calendar 
 
Calendar: The calendar feature allows you to add events, feed in events from other sites and supports single or multi-day events.
Atrium dashboard
 
Group Dashboard: This feature allows you to see the activity happening across your groups. Like in  iGoogle, you can arrange your Dashboard like you need it.
Atrium documents
 
Documents: The Document feature is an online handbook that allows collaboration on documents, storing and comparison of revisions, files attachments, and the ability to print out a whole Document hierarchy.
Atrium shoutbox
 
Shoutbox: A micro-blogging feature for your own group, that lets you share short messages, links and information.
Atrium casetracker
 
Case Tracker: This feature brings to you a full ticketing system. You can assign tasks and create projects within each of your available groups. Each case all the function that Blogs have + many others like a priority, a status,  ...

 

The Segments Intranet is completely customizable.

If you want a feature that's not on that list, we can add it to the system.