PostgreSQL project

Preferred license: New BSD license
PostgreSQL is a community-driven and owned open source database project, with twenty-one years of development starting at the University of California at Berkeley. We are widely recognized as the second best known open source database.
Actual source code produced by the student participants in Google Summer of Code™ for PostgreSQL project can be found here.
 
Current Projects
by Guodong Liu, mentored by Andrew Dunstan
by Florian Pflug, mentored by Simon Riggs
by German Poo-Caamano, mentored by Alvaro HERRERA Muñoz
by Robert Mach, mentored by Zdenek Kotala
by Ivan Zolotukhin, mentored by Oleg Bartunov