波士电子：RS-232/RS-485正宗专业厂家
BOSI electronics：RS-232/RS-485 expert English 中文
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scommassistant:RS-232 test software for Windows.
COMSHOW: shows RS-232 communication.
TEST9600.EXE ：RS-232/RS-485 test software for pure DOS.
NTPort:General PC hardware port I/O read/write dll (Windows XP/2000/NT/Me/98/95,regist code is delievered with type S812A data acquistion system)