"Oslo" is the code name for the Microsoft's next generation application development platform. The goal of "Oslo" is to provide a 10x productivity gain across the application lifecycle (design, development, and management). "Oslo" leverages domain-specific models, languages and tools to achieve this goal.

The SDK contains documentation, samples, copies of the “Oslo” models written in "M", and tools designed to help you write your own models in "M", including the code name “Intellipad” tool for code name “Oslo”.

http://www.microsoft.com/downloads/details.aspx?FamilyID=f2f4544c-626c-44a3-8866-b2a9fe078956&displaylang=en