VSPE is intended to help software engineers and developers to create/debug/test applications that use serial ports. It is able to create various virtual devices to transmit/receive data. Unlike regular serial ports, virtual devices have special capabilities: the same device can be opened more than once. Using VSPE you can share physical serial port data between several programs, create virtual pipes, expose serial port to local network (via TCP protocol), create virtual serial port device pairs and so on.

Free Virtual Serial Ports Emulator Features
Virtual device: connector
Virtual device: data splitter
Virtual device: pair
User mode device: TcpServer
User mode device: TcpClient
User mode device: Serial Redirector
User mode device: UdpManager
User-mode device: Bridge
Python scripting system
x86 and x86_64 processor architecture support