Encours.org is a teleconferencing system that works directly in your Web browser. It has shared slides that are visible to all, an integrated audio system with recording, "laser" pointers for lecturers, video replays of the presentation, and a chat interface with the audience. It can be connected to a phone server.
Utterson is a static blog engine. It is based on a bunch of shell scripts and a self-generating makefile. Only basic Unix tools have been used (m4, GNU make, ksh93, rsync, ssh, etc.). It comes with emacs integration and support for mailing in blog posts automatically via procmail.