Looks like Oracle is feeling the pressure from the free DBs like Postgres
From the Oracle webpage: Oracle Database 10g Express Edition (Oracle
Database XE) is an entry-level, small-footprint database based on the
Oracle Database 10g Release 2 code base that’s free to develop,
deploy, and distribute.
Looks like the maximum DB size is 4GB and it uses only one processor and at
most one GB RAM.
Having a free Oracle DB is good for the projects where one is forced to use
an Oracle DB.