Here is an announcement from IBM on SLRP (Semantic Layered Research Platform). The blog post describes various open source tools that make up SLRP.
The Semantic Layered Research Platform (SLRP, pronounced slurp) is the collective name for the family of software components produced by the IBM Advanced Technology group to utilize semantics throughout the application stack. We’ll be releasing these components to the open-source community over the next few months as we polish the initial versions of them and prepare supporting materials (examples, how-tos, documentation, …). This post is a summary of the components that we’ll be releasing, with a brief description of each.