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
Convert your data online, free
Free in-browser converters for CSV, Excel, JSON, XML and SQL: Withdata Online Data Conversion. Large files, batch conversion or scheduling? See the offline desktop apps, or browse all data conversion tools.