Ian Tien, HypersonicSQL Database Engine (hsql), open source Relational DB written in Java
Andrew Trevors, Jennifer Campbell & Josh Taylor, PostgreSQL, open source DB
Xinyi Dong,Yuan Lin & Lijie Zou, mySQL, open source DB
Basem Shihada, LEAP database, free, open source DB (written in C), approximately 30,000 line of code.
Hao Chen & Jin Xiao, PostgreSQL, open source DB
James She, PostgreSQL, open source DB
Jiajun Wu, Zhuang Fan & Fei Yuan, mySQL, open source DB
Gerald Tarcisius, Raihan Al-Ekram & Yu Ping, mySQL, open source DB
Xinyi Dong, Yuan Lin & Lijie Zou, PostgreSQL, open source DB
Heechul Lim, PostgreSQL, open source DB
Ryan Bannon, Alvin Chin, Faryaaz Kassam & Andrew Roszko, mySQL, open source DB
Hubert Chan & DmytroYashkir, Interbase, Borland (Firebird) open source DB
Bahman Kalali, dbXML, a data base for storing XML documents.
Erin Ren & Fraser Ruffell, PostgreSQL, an open source data base.