I am practicing developing software that can communicate with hardware via an RS232 connection. I am using new PC hardware and I don't have any serial ports, nor do I have any actual devices with me that use serial communication. Does anyone have any ideas or recommendations for software that can run on Windows, preferably on Windows 7 that can emulate a COM port device with basic text IO? It would be nice if I could use this software for free so freeware/open source software is best. Thank you.