HTC Titan/Mogul
HTC Vogue
HTC Touch 3G
HTC Touch Cruise II
HTC MAX 4G
HTC Touch Diamond II CDMA
HTC Touch Pro II CDMA
Samsung Epix

Main features
2G/3G (auto)/3G (only) automatic band switching based on:
- Running programs and their needs
- Availability of Wi-Fi
- Availability of USB
- Roaming
Idle data connections disconnect based on running programs (note that unlike the registry tweak this does not break simultaneous voice/data)
Manual band switching
Automatically disable data when roaming (including AGPS)
Pauses applications while switching bands (so you don't get networking errors)
Several predefined applications supported
Support for HTC/MSM72xx GSM devices (GSM/EDGE vs UMTS/HSDPA)
Support for HTC/MSM75xx CDMA devices (1xRTT vs EV-DO)
Support for various Samsung GSM devices (GSM/EDGE vs UMTS/HSDPA)