With Filestar you get 14 different skills for working productively with Silo 3D Model (.sib) files.
About .Sib
Name
Silo 3D Model
Extension
.sib
Category
3D
Developer
Nevercenter
Description
SIB files are 3D model files created with Silo, a free 3D modeling program. They contain 3D objects, textures, and materials used to create a 3D scene, and can be exported to a variety of other file formats.