Emacs standing alone on a Linux Kernel. I'm not an emacs user, but I thought this was really fascinating. Basically, the author took the linux kernel, a statically compiled copy of emacs, the mount command, and that's it. You could dd that to a hard drive and boot into only emacs. This gets me thinking about what I'm going to call SAOS - Single Application OS. Sort of like the python on a chip scene.
Python Apps the Right Way: entry points and scripts a very nice tutorial on making a python module, complete with setup.py. This one is very straightforward and simple. I'll be referencing it and redoing some of the code I've worked on.