...The iHome is an Internet of Things (IOT) demo project for the ionware ionC1 hardware and the software system and is a complete SCADA platform c/w ModbusTCP Servers and Modbus RS485 serial clients for scalable building automation projects.
See - ionware.io/free-offer/
support Modbus RTU(Master/Slave) on Serial and TCP
comm_svr is a communication software. It's now support Modbus RTU on serial and TCP(Master and Slave all supported).
comm_svr use Qt4.8.5 and POCO C++ 1.4.6.
Now, the release is on Win32 and Raspberry Pi(Debian).
Visual Synapse are component wrappers around the Synapse tcp/ip libraries. It wraps a few common internet protocols, like HTTP, UDP, DNS, ICMP, TCP and SMTP to multi-threaded components that can be used with Delphi, Kylix, Freepascal and C++ Builder.