Event is a simple to configure PHP-based event listing system. It allows you to easily and quickly configure an event in a regualr text file and instantly have a complete site constructed around that site including direction pages and related links. Event doesn't required or support (at this time) any complicated database back-ends; it's designed for simplicity of implementation.
Event also supports an RSVP and contact form to e-mail event hosts.
Event is released under the GNU General Public License version 2.
A sample configuration file is included in the release file. I also run event at my own site. If you find Event useful, and are running it publicly, I'd be interested to know.
You can get the latest versions in the release directory.