Oracle has recently (September 2011) released Oracle Database Express Edition 11g Release 2 (Oracle Database XE). This is an entry-level database based on the Oracle Database 11g Release 2 that has a small-footprint. It’s free to “develop, deploy, and distribute”. It is also fast to download and simple to install.
The default character set used during installation and setup is AL32UTF8, which is perfect for use with WebCenter Content development machines!
Oracle XE 11g also supports Oracle Text.