I use Nedit, with a perl calltips file I wrote (see it at Nedit perl calltips) and an autocompletion macro. Together, they provide autocompletion and contextual help for all standard perl functions.
I sometimes use ctags too, so I have the same functionalities for all libraries I may use. The only thing I haven't got is the step-by-step debugger, but I really never actually feel the need for it.