WinTray is a small and simple no install script or program built using the AutoIt scripting tool that works with Windows Vista and earlier Windows versions which allows programs to be minimized to the tray instead of the taskbar therefore saving taskbar space.

The icon used in the tray will be that of the minimized program’s [...]

The xNeat Windows Manager is described by its author as
xNeat is a very handy windows enhancement utility that gives you full control over your windows and adds functionality to your desktop that you wish that Microsoft had included. It’s neat, compact and combines many useful programs into one.
The xNeat Windows Manager adds several useful [...]