I'm a developer of STermPro utility, a software solution for hardware development and debugging.
1) friendly user interface with many things STermPro doing for you automatically (logging, parsing, CRC-checking, auto-respond, etc)
2) protocols support; you may define you own protocols in a simplest way, without programming or defining a macro
3) auto-respond for device emulation through virtual port driver (like com0com)
Utility works extremely stable. Tech support @ STermPro forum is included.
Low price, useful features, 10-day trial.
[b]Feedback is highly appreciated.[/b]