Clawsker is an applet to edit Claws Mail's hidden preferences.

Claws Mail has a high number of configurable options and, in order to
keep the binary small and fast, some of these preferences which are not
widely used are not provided with a graphical interface for inspection
and/or modification.

Users wanting to edit such preferences had to face editing the
configuration text files directly, now it is possible with a convenient
GTK2 interface using Clawsker.