Withdata Software provide some ETL (Extract-Transform-Load) tools for DB2:
TxtToDB2 Load TXT, CSV, TSV data to DB2
XmlToDB2 Transform XML data to DB2
JsonToDB2 Transform JSON data to DB2
XlsToDB2 Extract data from Excel to DB2
AccessToDB2 Extract Access data to DB2
MsSqlToDB2 Extract SQL Server data to DB2
MysqlToDB2 Extract MySQL data to DB2
OracleToDB2 Extract Oracle data to DB2
PostgresToDB2 Extract PostgreSQL data to DB2
SqliteToDB2 Extract SQLite data to DB2