PostgreSQL

PostgreSQL

Free
It has all the features you would expect of a mature world class database
 
1.2
License type: Freeware

For years PostgreSQL has been recognized for its transaction processing capabilities and performance across a wide array of query intensive and mixed load applications. In development for over 20 years, PostgreSQL has all the features you would expect of a mature world class database including: full ACID compliance and relational integrity, MVCC, XML support,PITR, triggers, stored procedures, support for multiple procedural languages and much more.

Info updated on: