pgimport imports data from a flat file and insert it into a database table. It uses a flat file per database table, and you can configure as many Sections as you want, each one associating a table name and a data file.
The pgimportproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pgimport, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.