This post contains universal keyboard drivers of all kinds, including PalmOne, MicroInnovations, ThinkOutside, Targus, and others.
ThinkOutside was a startup that produced pocket-sized folding keyboards, initially for Palm serial devices. Their later offerings include infrared, Bluetooth, and Pocket PC support. Their last driver offering for Palm OS (just after being bought by Mobility Electronics, which then renamed itself to iGo) quietly included support for their Bluetooth product on some devices. Some Targus stowaway keyboards are rebranded ThinkOutside keyboards, and work with their driver.