I like phpManager, I purchased it(12/23/2001) when they first came out with the ver1.0
It's very easy to use and keeping records of your clients and many other features such as keeping all your clients informed, trouble ticket, etc. It's value for your money.
I recently downloaded the updated version 1.1.1 and having a slight problem getting it to work, connecting to the database, anyways, I email support and they will be looking at it tonight to help correct any problems that I am facing installing the new updated version.
Since it's still under the free updates and support for 1 year, I am very pleased with their prompt support and service accorded to me as a customer whenever I email them asking for advice.