I've been annoyed lately by the fact that PyDev doesn't information about classes and function when it code completes wxPython code.
Can anybody tell me FOSS IDE's or extensions that offer code information (function params, returns etc.) when it code completes for C/C++ and Python.
I am a fan of CodeLite, Eclipse CDT and CodeBlocks in that order for C/C++ (excepting non-FOSS) and PyScripter, PyDev for Python in that order.
See here, here and here for C++ autocompletion (also referred to as IntelliSense, taken from the name for Visual Studio's autocomplete).
And here for Python autocomplete/"intellisense" for vim. (I should point out I found the link to that from this post on SO).
If that doesn't include the ctags for wxPython as you require, you might want to check out this guy's ctags-based highlighting which apparently does work for wxPython (and perhaps take the ctags file from that?)
Probably also worth checking out this enormous list of Python IDEs on SO (specifically those with "AC" tags) if you've not already seen that? I realise your question is a bit more specific than just basic Auto Complete, but perhaps there's some new options in there for you...