We're looking to replace an internal system used for managing training classes with something a bit more robust. Needs to be open-source or have a license level that grants access to source, and needs to be ASP.net (C# preferred, but could live with VB.net)

Ultimately, we'll need to be able to assign facilities and instructors, manage attendees, send notifications, and build calendar views. We'll also be integrating with our website to allow on-line sign-up and other things for attendees to manage on their own.

We do expect to implement quite a bit of it in-house, but we'd like as broad of a base to start from as we can get. Still, just a really good web-based meeting-room reservation system might make a good enough starting point.

In list form:

• Meeting/training resource management software
• ASP.net (C# or VB.net)
• Source available
• We're expecting to have to modify the software to meet all of our requirements