Withdata Software provide some ETL (Extract-Transform-Load) tools for Oracle:
FileToDB Load TXT, CSV, TSV, XML, JSON, Excel, SQL, RDF, INI data to Oracle
DBToFile Export Oracle data to TXT, CSV, TSV, XML, JSON, Excel, SQL files
DBCopier Copy data between Oracle and other rational databases
MongoToDB Ease your MongoDB to Oracle converting work
DBBlobEditor Edit / Import / Export BLOB data in Oracle