CRM without the sales aspect?

We’ve been using Sage ACT since the dawn of time and not only do I hate it but when I upgrade our servers the version we bought outright will no longer be supported. I don’t really want to pay ACT any more than I need to based on experience over the years so I’m looking for alternatives. Basically I just need a place to store client information. Name, number, and some notes. I don’t need to be able to communicate through the software. Any ideas? I’m trying to keep costs low but we do monitor thousands of clients needs so I’m at a loss.