Oracle code version control

Does anyone know any oracle tool which maintains code for different releases of an application like version control. Please advise

Do you mean version control for code that you have written? Try PVCS.

I'm not sure if there's one built into or that can be integrated with Oracle, but there are a lot around depending on your environment. On unix CVS and SCCS are both used frequently. CVS is based on RCS and has a lot of added features, including network support so you can check out files remotely. There is a windows interface called WinCVS which can connect to the server so users just need to use a windows app, and a Web interface written in Perl called CVSWeb.

On Windows the only one I know of offhand is Source Safe and I haven't had much experience with it, but know it was used at a very large company I used to work for so it can't be all bad.