| Graham Chiu
There's a new download of Ren Garden as mentioned here https://forum.rebol.info/t/ren-garden-status-future/455
It's a QT app which runs a QTextEdit widget as a console and links to the Rebol evaluator, and the C++ API. You can setup watch points to see changes in values in your code for debugging purposes. So, you could run this when debugging your r3/ren-c code.