MapXtreme is a webmapping server which you can use to build (have build) a GIS application with a web interface. There is a Java version and a .NET version.
Do you want to make your geographical data available at the office and/or on the internet quickly and easily? You can do so with ArcIMS. IMS means Internet Map Server and it contains software that makes available GIS data and functionality on the internet or in powerful client applications.