Grpar is a BSD-licensed tool to extract Buildengine group (.grp) files. See Ken Silverman's Buildengine page (http://advsys.net/ken/build.htm) for more information.
Latis is a distributable storage engine for the semantic web. We plan to build a cross-platform, high-performance server that enables users to build private clouds which are protocol-compatible with popular web service offerings from Google & Amazon.