XDA member Jake044 has created two well-designed icon sets to use in Windows Mobile.
The first, ‘V1′, features bold, sharp icons set on a glossy black background which emphasises their colour while maintaining a sophisticated look for the device.
Icons found in the ‘V2′ set, maintain the previously mentioned glossy look but add rounded edges and a coloured background. Also included in both sets are folder icons which help to integrate the look of the icons further into the device interface.
The ‘V1′ set is available in this thread while the ‘V2′ set can be found here. Both should work on any Windows Mobile device, and will look particularly good in a Windows Mobile 6.5 start menu, or when used in the Sense Quick Links._________