Shard is developed and maintained in a Git repository at github.com, which can be found here:
http://github.com/Tarendai/Shard
Note that you will need a copy of VS 2008 to build Shard, as well as the Spring engine source code and dependencies. Shard currently builds and links under linux using CMake, however it links to the lua VM used by the spring engine, not the lua VM source bundled in the repository, and as a result, crashes at startup when testing. I am currently investigating this with Spring Engine developers.