.Adesso, Belkin, Genovation, Kensington, Macally, Micro Innovations, Targus, Tripp Lite.

Adesso -

• AKP-160 - Price Check(Street Price $24) - Adesso - AKP-160 - USB Numeric Keypad With Built-In Calculator with Large LCD display, 19-keys, 31-inch Retractable Cable, Windows Vista/XP/2000/ME/98
• AKP-150 - Price Check(Street Price $18) - Adesso USB Keypad, 19-keys, USB interface, retractable USB cable, silver color, win98/ Me/ 2000/ XP/ Vista

Belkin -

• n/a

USB

• Micropad 631 - Price Check (street price $36) - 18-Key Numeric Keypad, USB Connection, compatible with all PC notebook computers, Dark Gray, "Backspace key" No software required, Windows 98/2000/ME/xp
• Micropad 630 - Price Check(Street Price $56) - Genovation USB Numeric Keypad, 21-keys

Serial

• n/a

USB

• K72274US - Price Check(Street Price $21) - Kensington Notebook Keypad, full 19-key pad and USB hub and Full financial calculator all in one, Windows XP/2000 / Vista
• K72273US - Price Check(Street Price $45) - Kensington Wireless Notebook Keypad/Calculator and Wireless optical mouse Set, receiver connection through USB, Windows XP/2000/Vista

• 33059 - Price Check (street price $29) - Kensington Numeric Keypad with a fully-functional integrated calculator, USB interface, 19-key layout and an ultra slim, lightweight design, Non-syncing Num-Lock, Detachable USB cable retracts into a small compartment

• n/a

• KP25B - Price Check (street price $12) - Micro Innovations KP25B Numeric Plus Keypad (USB), 19-KEY

USB

• PAUK10U - Price Check (street price $19) - Targus USB Numeric Keypad, 19-key, USB 1.1 interface, Silver color, extra "000" and "backspace" keys, Low-profile key design, 3.56x6.31x1-inch, 5.5 oz , win98/ME/2000/XP
• USB Mobile Mini Keypad - Price Check (street price $39) - Targus Mobile Mini Keypad, 17-key, External USB interface, lightweight, ergonomic design , Retractable 24" USB Cable, PnP, 5.32x3.51x1.02inch (13.5 x 8.9 x 2.6cm), 1 Year Warranty, 4.7 ounces (136 grams), win98/2000/Me/XP

Wireless

• AKP01US - Price Check(Street Price $25) - Targus Wireless Stow-N-Go Keypad keypad, USB interface for the receiver, wireless interface

USB

• KP3040 - Price Check(Street Price $26) - Tripp Lite Notebook Keypad - keypad, 2 USB ports, USB Powered, USB 2.0/1.1, for Windows 95/98/ME/2000/XP