Automatic Data Syncronization

Hi
I am looking for some info on data synchronization between 2 critical applications in our client's enterprise. One is a Mainframe application and the other is windows based and the window based application is what our end users, customer service staff use. The window based application is not always in sync with our core application so there is a lot of redundancy and manual overhead. I am looking for information on any innovative synchronization models that you want to suggest. I appreciate your response.

Thanks.