I have been using Emacs since 1999, and I have used it as my primary editor while shipping commercial C++, Perl and Python projects. I've used it write code for Linux, Mac OS X, Windows and the Xbox 360.
In that time, I've shaped it to do a lot of interesting things.
Here is my Emacs Wiki Personal Page. Where my solutions are sufficiently general, I will post them to the venerable Emacs wiki rather than isolate them on this page.