Here's a 2023 December recommendation for lDebug that I recently found: https://forum.vcfed.org/index.php?threads/ldebug-%E2%80%94-%E2%80%9Edebug-de-luxe%E2%80%9D.1245789/

Vintage Computer Programming

LDebug — „debug de Luxe”!

  Roger Wilco - Dec 2, 2023 

For all of you interested in x86 assembly programming this newest edition of „debug” may be truly interesting, as being fitted with numerous improvements and add-ons: https://pushbx.org/ecm/download/ldebug.zip

pan069 - Dec 6, 2023

Sounds interesting. Is this it? ecm's webbed site

  Roger Wilco - Dec 6, 2023

Yes, she's the main developer right now.

  VileR - Dec 11, 2023

I've been using DEBUGX/Enhanced Debug for a while, seems like the feature set is pretty similar.

  Roger Wilco - Dec 11, 2023

Not quite — Debugx may have „resident” feature set pretty similar, but LDebug gained recently a whole lot of extensions in form of *.ELD files. Just try it!