Withdata Software provide some ETL (Extract-Transform-Load) tools for DB2:
FileToDB Load TXT, CSV, TSV, XML, JSON, Excel, SQL, RDF, INI data to DB2
DBToFile Export DB2 data to TXT, CSV, TSV, XML, JSON, Excel, SQL files
DBCopier Copy data between DB2 and other rational databases
MongoToDB Ease your MongoDB to DB2 converting work
DBBlobEditor Edit / Import / Export BLOB data in DB2