KETL is an open source ETL tool by Kinetic Networks that is gaining mindshare of late. It is currently downloadable as part of Bizgres BI project, but can be setup for other databases with a little tweaking.

KETL is different from Kettle, another open source ETL tool. You can read more about the similar names here at Nicholas Goodman’s blog. While Kettle is GUI oriented, KETL is scripted and probably more robust.

Read the KETL training doc to know more about its architecture and usage.