Disable USB Ports Tool is the best software that helps an individual.
It makes images of USB flash drives or MP3 players and mount them as USB drives.
GiliSoft International LLC
Add a lock to your most valuable data by blocking your USB ports and drives.
Disables all USB drives to prevent data theft and malware infection.
CJSecure Pty Ltd.
Keep your PC protected against virus attacks coming from your USB devices.
USB Protection Tool can secure your USBs from anonymous access.
Com Port Monitor is a rs232 rs485 rs422 software tool. Powerful, easy to use.
Software USB port sniffer, monitor tool with protocol analyzer and data logger.
Barcode scanners can be connected to PC through serial port or USB port.
Advantech Equipment Corp.
A gang programmer, which works through your PC's USB port or parallel port.
Delta Power Solutions
Connect to the UPS directly through the RS232 or USB.
microEngineering Labs, Inc.
It's a software that can help you to connect to a PC USB port.
SEH Computertechnik GmbH
It is a free application that can be used on print servers with a USB port only.
SEA spol. s r. o.
This application will let you to control easily GSM RELE 3 from PC via USB port.
With this software you can control up to 16 servos through PC's USB port.
usbpicprog is an open source Microchip PIC programmer for the USB port.