Mahara
As described on the Mahara site:
"Mahara is an open source e-portfolio system with a flexible display framework. Mahara, meaning 'think' or 'thought' in Te Reo Māori, is user centred environment with a permissions framework that enables different views of an e-portfolio to be easily managed. Mahara also features a weblog, resume builder and social networking system, connecting users and creating online learner communities.
Mahara and Moodle can use authentication plugins to provide single-sign-on for the two applications out of the box."