Today I’ve been working with Maxime on getting his GSoC work to compile on Windows, and we succeeded. Get the Freestyle enabled build from Graphicall.org!
To use, extract the .exe somewhere, open a cmd.exe and cd your way to where you extracted the binaries, ie: ‘cd C:\freestyle\befree-win32′ if you extracted to C:\freestyle. Then set the FREESTYLE_BLENDER_DIR as follows:
After that start blender: blender.exe and choose Freestyle as renderer in the render settings. A new panel in render settings appears, here you can choose different freestyle module to render with. Hit F12 and enjoy!