Ora2Pg is a free tool used to migrate an Oracle database to a PostgreSQL compatible schema. It connects your Oracle database, scan it automaticaly and extracts its structure or data, it then generates SQL scripts that you can load into your PostgreSQL database.

Ora2Pg can be used from reverse engineering Oracle database to huge enterprise database migration or simply to replicate some Oracle data into a PostgreSQL database. It is really easy to used and doesn't need any Oracle database knowledge than providing the parameters needed to connect to the Oracle database.