PostgreSQL and EnterpriseDB
I agree, Firebird and Fyracle are a decent choice but it seems the best
free solution are PostgreSQL (http://www.postgresql.org) and
EnterpriseDB (PL/SQL interface to PostgreSQL :
Some words about PostgreSQL/EnterpriseDB::
the richest in feature free database: schemas, statement and row
triggers, rules, replication, clustering, MVCC, inheritage,
unlimited characteristics for database objects , ....
Conclusions:
PostgreSQL/EnterpriseDB has almost all the avantages of Oracle but doesn't the disavantages.
There are low in resources, dinamic allocation, automaitenance, free, facts for NO WORKAROUND in Oracle.
If you like PL/SQL and others Oracle's features, try PostgreSQL/EDB !
Bye, bye Oracle !