qb is a blog system for people who don't want to install a database server, but want performance and like to be able to send entries via SCP, cron jobs, or other obscure methods.
Topic Database provides a standardized context for plain text databases which can be read and edited in most text editors without difficulty, and easily parsed programmatically as well. Example parsers are available in several languages.
A syllabus authoring Web application.
A Live Linux distribution with a focus on education.