CRM software

Sorry if this is a little off topic. I was wondering if anyone knew of a simple yet effective CRM package written in PHP and MySQL. If have seen a couple on hotscriptsw.com but they are a little outside what I need. All I need is a package that you can install on a webserver which would allow various people at different locatioons access to the data data. This data would be tracking information on customers, similar to a sales activity manager. I have tried a few which come close to what I want, but they do not allow all users access to the the same data. Each users data is kept separately. We basically just need a tool to store event and activities so that everyone is on the same page. Thanks merle