As we grow I am finding it quite difficult to keep up with licensing from my good 'ol Excel spreadsheet... It is such a tedious process and I am really looking for a better way of maintaining proper documentation of licensing.

I've considered just developing my own licensing manager in php/mysql but did not want to reinvent the wheel if it is not needed. So with that said, what is everyone else using to manage their licensing? When I say licensing I mean a broad array of items: DirectAdmin, cPanel, Plesk, ClientExec, Windows, etc etc.

If there are any prebuilt systems geared towards this type of thing I would love to know about them