New: I have completed the first version of the test harness for a SimpleLTI descriptor in an IMS Common Cartridge.
New: An open source implementation of this spec is available for Microsoft SharePoint at http://www.codeplex.com/LTIWebPart - this was developed by LearnGauge.
New: Sample code for .NET is available in the download section.
In anticipation of IMS Learning Tool Interoperability Version 2.0 spec, I have developed a simple approach that can quickly be used to integrate externally hosted tools into Learning Management Systems.
This site is written in Python and is running on the Google Application engine.