Orckestra CMS Foundation - a .NET based Web Content Management System, open source and a bundle of joy!
Visit http://docs.cms.orckestra.com/Getting-started/Guide
Download binaries from https://github.com/Orckestra/CMS-Foundation/releases/latest
Head over to https://orckestracms.codeplex.com/discussions to ask questions
Orckestra is the company driving the development of Orckestra CMS Foundation. We have a team working full time on this CMS and on other cool stuff you can add to it. We are situated in Austin, Montreal, Copenhagen and Kiev. We specialize in enterprise commerce software.
You can visit us at http://cms.orckestra.com and http://www.orckestra.com/