Windows > Desktop customization software

Glass2k

Make windows transparent
Download Glass2k Beta 0.9.2 free
Start8

Has two options for adding a start menu to Windows 8
Download Start8 Beta 1.17 free
ViStart

Invoicing software with a wide range of customization options
Download ViStart 8.0.0.4040 free
Madotate

Productivity freeware that maximizes your monitor's workspace via 3D interface
Download Madotate 2.02.02 free
Nyan Cat Progress Bar

When memes get useful...sort of
Download Nyan Cat Progress Bar 2.1.1.1 free
My Start Wallpapers

A free program for windows, by Selim Ata
Download My Start Wallpapers 2.1.5.0 free
Multi-Meter (Quad Core)

Monitor the load on quad-core processors
Download Multi-Meter (Quad Core) 1.00 free
Vitrite

Apply transparency to program windows
Download Vitrite 1.1 free
Show Desktop

A Show Desktop for XP like in Windows 7
Download Show Desktop 1.042 free
iPad Launcher

A Free Desktop customization program for Windows
Download iPad Launcher para Windows 7 1.0 free