hxxp://en[.]wikipedia[.]org/wiki/Source_(game_engine)

hxxp://www[.]blender[.]org/

hxxp://steamcommunity[.]com/workshop/filedetails/?id=16524

hxxp://www[.]blender[.]org/download/

hxxp://steamcommunity[.]com/groups/BlenderSourceTools/announcements

hxxp://steamcommunity[.]com/groups/BlenderSourceTools/discussions

hxxp://developer[.]valvesoftware[.]com/wiki/Blender_Source_Tools_Help

hxxp://developer[.]valvesoftware[.]com/wiki/Animation_in_Blender

hxxp://developer[.]valvesoftware[.]com/wiki/Flex_animation

hxxp://developer[.]valvesoftware[.]com/wiki/Compiling_a_model

hxxp://steamcommunity[.]com/groups/CrowbarTool

hxxps://github[.]com/Artfunkel/gimp-vtf/releases