WinSoft ComPort 4.3 D5 XE6 No Source

Delphi and C++ Builder component for serial communication for Windows.

communication with devices connected to serial port
easy of use and very powerful
uses multithreading and overlapping for maximum performance
available for Delphi/C++ Builder 5 - XE6 and Lazarus 1.2
source code included in full version
royalty free distribution in applications