You can download the software here: http://www.oracle.com/technology/software/products/database/xe/index.html
The downloads come in two flavours: A Western European Edition and an Universal Edition
- Oracle Database 10g Express Western European Edition - Single-byte LATIN1 database for Western European language storage, with the Database Homepage user interface in English only. The character set is WE8MSWIN1252.
- Oracle Database 10g Express Universal Edition - Multi-byte Unicode database for all language deployment, with the Database Homepage user interface available in the following languages: Brazilian Portuguese, Chinese (Simplified and Traditional), English, French, German, Italian, Japanese, Korean and Spanish. The character set is AL32UTF8.
- Oracle Database 10g Express Client
Client software to be installed on client systems for remotely accessing Oracle Database 10g Express Edition.
The downloads are available for both Windows and Linux x86 platforms. The software is not installed using the standard Oracle Universal Installer (OUI) but uses the native installers, Microsoft Installer packages and RPMs for Linux. Specific Debian packages will be released shortly.