The Djuggler software can be downloaded as a trial. For a list of all features please see the feature list. The trial is valid for 30 days. The trial version can later be validated by purchasing a registration key from this web site.
The trial does not have any limitations except for exporting data. When exporting data from a DataGrid, exports to Excel, CSV and SQL server are limited to 100 rows. Registered verions do not have this limitation. Other than that, the trial is fully functional.
See also the release notes to see the changes made with respect to version 3.3.3.