LAMS is Java-based, GPL-ed software from Australia for designing learning activity sequences.  Previously this year, the LAMS Foundation announced integration with Moodle.  Today, LAMS announced integration with Sakai.

From the LAMS - Sakai media release:

The integration of Sakai and LAMS makes it easy for faculty to select existing LAMS "sequences," or author new sequences, and add these to their course pages. Students then access sequences via a simple link on their course page. The integration achieves “single sign-on" – once a teacher or student has logged into Sakai, no additional login is needed to access LAMS. For faculty, a LAMS sequence that is created in one course can be re-used or adapted for another course, or shared with colleagues anywhere.