Z8E is a full-screen symbolic debugger for the Z80 CPU, known from the former CP/M User Groups.
Main features:
- Screen-oriented.
- Animated debugging.
- Z80 and Z180 versions.
- Auxiliary terminal support.
The current version is 4.2, which fixes an obscure bug that affected reading of symbol table files that ended exactly at a record boundary without an explicit end-of-file character (a valid CP/M condition).
More details here.