Emacs Docs
The main GNU Emacs documentation, but in a very attractive online form.
Elisp in replacement string
Something I've never really paid attention to, and it's actually quite a powerful feature: when doing search/repalce in Emacs you can replace with Elisp code (as in, Elisp code can provide the replacement).
The original magic Emacs garbage collection hack
Post going over a pretty sensible approach to doing GC in Emacs (not that I've ever really run into a problem with Emacs and GC).
Blurring the lines between shell and editor
Cool things to do to blur the line between Emacs and Eshell.
eplot: Emacs library for creating charts
Library for doing pretty nice-looking plots in Emacs.
wyuenho/emacs-pet: Tracks down the correct Python tooling executables from your virtualenvs so you can glue the binaries to Emacs and delete code in init.el
What looks to be a module for Emacs that helps find the right venv for a project; I think. Saving this to look at at some point in the future.