Converting Collada 3D Digital Assets (.dae) to common 3D objects (.obj) should be doable in pretty much any 3D modeling programs nowadays and same goes for dedicated CAD/3D modeling conversion software. Such dae to obj conversion is typically used to get a generic OBJ version fo Collada format.
Open DAE file Open OBJ fileA CAD 3D geometry translation software
A Mac version of the popular 3D visualisation software
A converter for 3D formats
An online CAD conversion service
A web-based freemium 3D computer graphics software
A Mac version of the popular modeling tool
An FBX convertor utility from Autodesk
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
A free online 3D model conversion service
A commercial online CAD converter
A 3D CAD translation software