Oracle Text Importer: OraLoader, OraCmd.
OraLoader is a GUI importer, and OraCmd is a command-line importer.
OraLoader is a data conversion tool that helps DBA and database developer import/export Oracle database from/to flat files and Excel files : http://www.withdata.com/oraloader.html .
OraCmd is a command-line tools that can run sql command, import/export data, even without Oracle client : http://www.withdata.com/oracmd.html .