The nrComm Lib is set of Delphi VCL components, classes and routines for serial communication tasks. Library helps to get access to various devices: serial port, data and voice modems, barcode scanners, Human Interface Devices (HID), Bluetooth, USB, LPT, GSM, GPS and others. It provides solution for quick implementation almost any packet data protocol. It can work with sound and speech. Library allows send SMS messages over connected mobile phone (GSM terminal) and much more.
nrComm Lib evolving since 1999 year. Latest release supports most oldest and newest Delphi/CBuilder versions. Our project is always in progress and our team will include into product new features for support modern device interfaces and system API.
Note: To the date of this post, it's still the most recent version.