remote on-line backup software for service provider

We'd like to develope our own remote on-line backup software for our on-line backup service. We need something like Ahsay, Vembu's StorGrid or Remote backup system's Rbackup, etc. It needs to support backup client for Windows, Linux, Solaris, Oracle database, MS SQL, MySQL, etc. The server side should be able to run on Linux platform. We'll own the intellectual property of this software after it's completed.