Kentico CMS 3.1a

Kentico CMS for ASP.NET is a full-featured content management system for building web sites, on-line stores, intranets and Web 2.0 community sites.

It comes with a Free Edition that can be used also for commercial projects.

It features:
- Advanced content management system with workflow, versioning and permissions
- Easy development and deployment
- Flexible design and navigation
- Smooth integration of custom code and modules
- Full C# source code (available only with source code license)
- Multilingual, UNICODE and RTL support
- Full-text search
- News and RSS feeds
- On-line forms
- Newsletters
- Discussion forums
- Messaging
- E-commerce with PayPal and Authorize.NET support
- Blogs
- Polls
- Web Analytics
- User contributions (Wiki)
- Reporting
- Booking system
- Geomapping
- Search Engine Optimization (SEO) and web standards support
- 90+ web parts

... and other great features