ArcGIS Mobile is a tasked-based mobile GIS application for viewing, collecting, searching and synchronizing GIS data directly with ArcGIS Server. It provides central management, configuration and deployment of mobile data, maps and projects.
ArcPad is a feature rich mobile GIS application. ArcPad includes advanced tools for finding, creating and updating GIS information. ArcGIS Desktop provides check-out and check-in management of ArcPad data and maps.