MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
The Idea Swap - The sticky note way of exchanging ideas
SlimWiki - Beautiful Wikis for Teams. Get started today, free forever!
Pasteline - Pasteline is an app for quickly saving notes, quotes, and links.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Planview PPM Pro - Take your PMO to the next level with cloud-based project portfolio management software from Planview.