You want a commercial database? There's a lot of them, but if you're just looking for document control - heck - well, how big is your company (employees)?
I'm using QSI (Quality Systems International), they have a module called System 9000 that seems to work pretty well. It runs on Lotus Notes. I'm still getting used to it, so I won't make any definite recommendations. They have a web page you can check out.