I have developed an application called AstLogger Desktop which is run on the PCs of call center agents. This application is for logging of business data that associated with call records of AstLogger. When you search call records using AstLoggerWeb, the data which is logged can be displayed together with the call information. By the way, this application is FREE. Also, the source code is here.
ScreenPop 1.4.2 and AstLogger 1.4.6 are also released for this application.