With Filestar you get 14 different skills for working productively with X3D Binary Format File (.x3db) files.
About .X3db
Name
X3D Binary Format File
Extension
.x3db
Category
3D
Developer
X3D Consortium
Description
X3DB is a 3D graphics file format used to represent 3D models and scenes using the X3D standard. It is a binary format, providing higher compression and faster loading times than the equivalent X3D XML format. X3DB files can be used to represent characters, environments, and objects, and can be opened and edited using a variety of 3D graphics software.