ELTIMA Software GmbH
Virtual Serial Port Driver creates virtual serial ports.
HW Virtual Serial Port allows creating virual serial port drivers.
Advanced USB Port Monitor will allow you to display the packets sent.
VSPE is intended for engineers and developers to create/debug/test applications.
USB Flash Drive Manager is a flash device special data management utility.
Virtual serial ports look and work exactly as real hardware serial ports.
Free, unrestricted Virtual Serial Port driver for any TCP/IP devices.
Sollae Systems Co.,Ltd.
ezVSP is a virtual serial port driver and TCP/IP socket program.
It emulates RS232 serial ports connected via virtual null-modem cable.
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.
Jungo Connectivity Ltd.
A PCI/USB device driver development tool with support for USB, PCI, ISA, etc.
USB WebCam Driver as it name states is a driver designed for your webcam.
Software USB port sniffer, monitor tool with protocol analyzer and data logger.
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.