GoLec is a java applet and application for digitizing and playing lectures about the game of Go. GoLec was developed by Jeff Henrikson for the MIT Go Club for their ongoing lecture series by 5 dan Kevin Zhao. For information on their lecture series, see

http://web.mit.edu/mitgoclub/www/iap-lectures

You can read the periodically out of date javadoc for the code, GoLecPlay is the applet and application entry point.

You can browse the source code from the CVS repository.

And you can see the Sourceforge summary page.