Simon Willison’s Weblog

Debugging in Python. The missing manual for Python’s powerful pdb debugger. 18th November 2009, 12:34 pm

pudb. A full-screen, curses console based visual debugger for Python, built using the urwid console UI library. 1st November 2009, 12:09 pm

DebugBar. Suggested at BarCamp London 3 as a useful tool for developing with IE; apparently includes a great JavaScript debugger. 25th November 2007, 10:32 am