The hk_classes are a set of nonvisual routines that allow you to
develop database front-end applications as easily as possible. You also
need a database driver to run applications. This package contains a
driver for MySQL, PostrgeSQL, and ODBC, which will be automatically
installed if configure finds a working database installation on your
computer.

Optionally, you can use graphical front-end libraries (for example:
hk_kdeclasses from the knoda package) to write intermediate X Window
System database applications in just a few lines.