I feel like I was ripped off with this application. In an ideal world I would have an integrated CRM system that would allow me to log all of my calls into a web based system so I can track when I last communicated with someone.
Highrise from 37signals is a pretty simple (both in usability and functionality) CRM. Top Floor is a client built to use the Highrise API. It’s a buggy mess. When I first purchased it, it was completely broken. The developer has since updated it however it still crashes way to much for my own good.