another set of xilinx makefiles
  https://github.com/marvin2k/xilinx_makefile

collection of tools
  https://github.com/Ceasar/xilinx_sucks

scons build scripts for xilinx
  https://github.com/ewa/xilinx-build-scripts

FPGALink JTAG-like thing
  http://www.makestuff.eu/wordpress/software/fpgalink/

Xillybus
  Win/Linux PCI-e DMA IP core and kernel drivers. Proprietary
  http://xillybus.com/licensing

On-chip JTAG for softcores
  http://moxielogic.org/blog/?p=704
  from the Moxie processor project