No specific info about version 2.1. Please visit the main page of ezVSP on Software Informer.
HW Virtual Serial Port allows creating virual serial port drivers.
Free RS232 serial port monitor/sniffer software for Windows.
Allows you to work with any serial devices connected to remote computers.
Free, unrestricted Virtual Serial Port driver for any TCP/IP devices.
XCM - XRF Config Manager is an application used to manage a XRF device.
With DuplexDr, you can create a pair of virtual serial ports.