Perixx Periboard-522 Wired Trackball Mechanical Keyboard, Build-in 2.17 Inch Trackball with Pointing and Scrolling
Amazon.com: Keyboard with Trackball Mouse, Wireless Multimedia Keypad QWERTY Layout, Mini USB Keyboard with Builtin Receiver Range 10m, for Smart TV, Computer, for Windows 2000 / XP / Vista / 7 : Electronics
Adesso Tru-Form Media 3150 Wireless Ergonomic Mini Trackball (WKB-3150UB)