CryEngine3 Utilities and Exporter for Blender
Original source: http://www.cryengine.com/community/viewtopic.php?f=315&t=103136
Official documentation: https://github.com/travnick/CryBlend/wiki
Feedback place: https://github.com/travnick/CryBlend
Place the io_export_cryblend folder into:
Your_Blender_path\scripts\addons\
Then, in Blender, go to file->User prefs->Add-ons and click the box to enable CryBlend, and save.