You can use the Command Line Interface (CLI) feature of Hexabitz modules from any terminal emulator software. There are a variety of open-source and free terminal emulators for all computing platforms.
If you want to develop and debug C/C++ code for Hexabitz, our current officially-supported tool chains are STM32CubeIDE, Keil uVision (Windows-only). However, you can edit your code from any editor and recompile it using GCC on Mac or Linux. You can also use the pre-compiled firmware HEX files available in the Compiled folder in the repositories.