Knoda is a database frontend for KDE. With its latest release, Knoda introduces support for Firebird and Paradox databases, now supporting all open source SQL servers. Besides managing tables and queries, Knoda also lets you create forms and reports, scriptable via Python.
Supported database formats are:
Other enhancements are data aware image fields for forms, and the possibility to store and load connection information, so login can be much easier. Also some bugs are fixed.