Another 25 beautiful Windows XP themes (A fresh new collection)
25 beautiful Windows Vista themes (For Windows Vista users)
32 gorgeous and unique Windows 7 themes
25 beautiful icon sets for Windows
21 most beautiful mouse cursors for Windows
Wood Visual Styles - Transforms everything to wood! This theme is tested in Windows XP SP2. A few people reported problems with SP3. (This theme is no longer available. Sorry.)
Kupo XP 2.0 - A very minimalistic design available in 5 colors.
Luder - Another minimalistic theme with a clean green look.
Aurum VS 1.1 - A bit of Vista's Aurora look.
Delta VS - A silver gray theme with mild colors.
DUO - A mixture of Vista and Mac.
Ubuntu XP - This is the closest Windows XP can get to Ubuntu! Brilliantly done.
Simplebox - This time it's Fedora. (This theme is no longer available)
Clearlooks Gummy - This theme pack gives a "Gnome" look to Windows XP. Available in 14 different colors!
Cadoo Visual Style 1.0 - A smooth whitish theme that gives a great contrast to any icon set.
OSX Tiger V - Give Windows the Mac look. Very nicely done.
Leopard X - Another Mac theme with a slightly darker look.
VistaPerfection X4 - One of the best looking Vista theme for Windows XP.
Dream LH 1.0 - Another theme with the Vista look, but darkish and black explorer window and task panel.
EX2008 Visual Style - A darkish theme with a tinge of green. Very minimalistic.
SlanXP 2.0 - Another dark theme for Windows XP.
GAIA - A very simple yet elegant theme with mild colors.
Greenius.VS - Another beautiful green theme. (Green seems to be the preferred color for designers)
1. Download and install Uxtheme patcher. During install a message will be displayed that important Windows file are being replaced and will ask you to insert the windows CD to fix it. Just ignore and click "continue"
2. Download the theme pack and copy the folder containing .msstyles and shellstyle.dll (this is inside another folder) to C:\WINDOWS\Resources\Themes\