From PostgreSQL wiki
Blurbs for use with conference advertising
PostgreSQL is the world's most advanced and rapidly evolving open source database, with more than 20 years of development by a community of hundreds of database developers from dozens of countries. Our long time support of an enterprise level feature set including transactions, SQL standards compliance, aggregation and subqueries makes PostgreSQL suitable for large enterprises and governments. Easy extensibility through stored procedures and custom data objects makes PostgreSQL exciting for developers. Try PostgreSQL for your next database application!