2011-08-27 Lorance - I made some changes to Yet another Tcl debugger and put it up on GitHub .
There is a manpage, README (same content) and a Make file to install with. I eliminated the bug that caused variable tracing to enter the debugger code. I also made it a bit less user-hostile.
Let me know if you find any bugs or want specific changes. It is obviously a work in progress..