SPE is a python IDE with auto indentation&completion,call tips,syntax coloring&highlighting,uml viewer,class explorer,source index,todo list,pycrust shell,file browsers,drag&drop,Blender support.Spe ships with wxGlade,PyChecker and Kiki.
KerX (Kernel eXplorer) provides a simple way for reading the very low-level data structures of the OS (GDT, IDT, TSSs, Page-Tables, Page-Directories, etc...)