Blender.org is the official site of Blender, the open-source 3d rendering/graphics program. Both the site and the program are well-thought-out and safe. Blender.org has lots of excellent tips and tricks for using the program.
The open source 3d modeling and animation software "Blender", which is distributed here, is a powerful software that can create amazing results. It however takes quite a while for beginners to learn how to use it.