.3ds
3DS model3D Studio
The scene format of Autodesk 3D Studio for DOS, from 1990. It stores meshes, materials, lights and cameras, but each mesh is limited to 65,536 vertices.
Older 3D asset libraries and models shared before modern formats arrived.
Opens in Blender, 3ds Max, Cinema 4D, MeshLab
About 3DS files.dae
COLLADA modelCollaborative Design Activity
An XML 3D interchange format created by Sony Computer Entertainment and now maintained by the Khronos Group. It holds geometry, materials, effects, skeletons and animation.
Exchanging models with older engines, SketchUp and Google Earth.
Opens in SketchUp, Maya, Cinema 4D, Quick Look on Mac
About DAE files