kdelnk2wmaker is a converter which outputs data suitable for inclusion in Window Maker's menu from KDE links. The major difference from other such tools is that this one supports i18n and can output application names in your favourite language (if that information is included in the kdelnk file).
Wmbattery displays the status of your laptop's battery in a small icon. This includes if it is plugged in, if the battery is charging, how many minutes of battery life remain, battery life remaining (with both a percentage and a graph), and battery status (high - green, low - yellow, or critical - red).
wmalbum is a Window Maker dock applet that displays album covers for songs being played by XMMS. You must already have images of the album covers stored near the file being played. WMAlbum provides a handy circular menu for play/skip/etc, adjusts volume using the mouse wheel, and can replace wmxmms.