MojoShaders allows converting Direct3D shaders to OpenGL on-the-fly and was developed by Gordon in the process of porting various games to Linux. Among the games using MojoShader is the never-released-for-Linux Unreal Tournament 3, Killing Floor, Unity, Super Meat Boy, Shank, and others. Additional details on MojoShader can be found on the Icculus.org project page.
For the past few months there hasn't been much activity with the MojoShader Mercurial repository, but that has changed in the past two weeks. As can be seen from the web viewer front-end to the MojoShader repository, it goes from no real development in the past 3~4 months and then all of a sudden in the past two weeks to a number of commits by Ryan himself.
Among the work in the past two weeks were some clean-ups, support foe new opcodes, fixes, and other work. Let's hope Ryan's renewed work on MojoShader will be for yet another Linux game port from Windows, but he hasn't said anything at the moment.