GNU MCU Eclipse Plugins

Source code:

https://github.com/eclipse-embed-cdt/eclipse-plugins

It took some time to find this plugin source code since there are multiple GitHub repositories under GNU MCU Eclipse Plugin

Check more on this here https://gnu-mcu-eclipse.github.io/

GNU MCU Eclipse plug-ins getting rebranded as The Eclipse Embedded CDT plug-ins for Arm & RISC-V C/C++ developers

Eclipse CDT based products

For my reference, I found this article very useful.
https://www.eclipse.org/community/eclipse_newsletter/2017/october/article2.php

Espressif joined the league by providing the Eclipse Plugin for ESP-IDF for developing ESP32 IoT applications.

Check here https://github.com/espressif/idf-eclipse-plugin