Hands-On RTOS with Microcontrollers

Eclipse CDT and GCC

You can also choose to roll your own Eclipse-based IDE from scratch. Eclipse CDT is the de facto standard for C/C++ development. You'll also need to provide a compiler. ARM provides a full GCC site for cross-compiling to ARM Cortex-M devices from Windows, Linux, and macOS. It can be found at https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm.

Here are the quick stats for Eclipse CDT:

Website	https://www.eclipse.org/cdt/
Host OS	Windows, macOS, or Linux
Debugger support	GDB
IDE framework	Eclipse
Compiler	GCC
Cost	Free
License type	Eclipse Public License (EPL)

 

For those that don't care for the Eclipse IDE, another alternative ...