Windows 7 Systemtray Hider is a simple to use, portable application for Windows 7 that lets you quickly hide and unhide system tray in the Taskbar of Windows 7.
It may be useful, if you want to quickly hide a running application, for instance instant messenger or programs like Skype, from the taskbar.
The application is very easy to use and it has no installation needed. Just run it and click to on and off system tray from the taskbar.
If you like, you can download Windows 7 Systemtray Hider at source