wxBase contains most of the non-GUI classes from the wxWindows cross-platform C++ framework. There are 2 categories: generally useful portable code (date/time handling, command line parsing, regular expression support) and wrappers for the OS objects (files, directories, sockets, threads, etc.) allowing you to write portable programs easily.
wxDesigner is a dialog editor and RAD tool for the wxWindows C++ library and its popular Python and Perl bindings. It includes a visual dialog editor, a bitmap editor, a syntax-highlighting source editor, and built-in mechanisms for automatic generation of file skeletons, GUI classes, event handlers, and getter functions. It provides an identical user interface and identical functionality for C++, Perl, and Python, and it can generate output in C++, Python, Perl, and XML.
wxOptParse is a Python program that brings up a graphical representation of the command line options of a Python program, if it happens to use the standard optparse module. What this means is that if if you have a program that uses optparse you can optionally click on checkboxes, edit boxes, combo boxes, etc. instead of using the command line.