Now, any model format you upload to 3DVIA is automatically converted to COLLADA .dae, as well as 3DXML. Try it: it's free to use, and you retain the ownership and display prefferences of everything you upload to your account.
3DVIA is a 3D community offering free onlne storage, free file conversion, free 3D Web player and many more tools. You can upload your models to convert to COLLADA .dae, share them with a community of 120,000 users or just use the Web player on your portfolio or website!
DAE Format supports more information than 3ds and obj formats and is widely accepted through out digital applications.