Some of the projects we're involved with:

U-Boot
Secret Lab has assisted with supporting u-boot on both the Xilinx Virtex and Freescale MPC5200 platforms.

Linux on the Xilinx Virtex
We are contributing significant effort to improving support for the Linux on the Xilinx Virtex family of FPGAs. Much of the Virtex support code has been merged into mainline. Additional drivers which have not been accepted into mainline can be found on our git server: http://git.secretlab.ca.
You can also find additional documentation on our wiki: Virtex support page

Linux support for the Freescale MPC5200 and MPC5121 chips