UltraViewer can help you to support your clients remotely in an immediately way, made your work easily, faster and convenience; with UltraViewer, you can control multi-computer simultaneously or share your screen to many computers to watching. It is a freeware desktop sharing application that's advanced and well-designed.
Here are some screenshots to illustrate the features and user interface of this application:
VNC Connect
TeamViewer
TeamViewer Host
TeamViewer Portable
TeamViewer QuickJoin