[Boost-users] [asio] virtual/emulated serial ports?

Hello, Does asio, or another boost API, allow developers to create a virtual or emulated serial port? By virtual or emulated, I mean, creating a software serial port that looks and feels just like the physical hardware, with device protocol to boot. Or something like a serial-tcp/ip bridge might be satisfactory as well. Oh, free, or not as expensive, is preferred, of course... :) Thank you... Best regards, Michael