Phluid is a window manager that emphasizes efficiency, speed, and beauty. It uses rasterman's Imlib2 library as the image/font rendering backend. It also attempts to be flexible and compliant with the ICCCM standard and gets a lot of its inspiration from the enlightenment window manager, but some of the initial code design is based on aewm.
lwmenu is a TCL/Tk program that displays an application menu at the current X pointer position. It was written in order to scratch an itch--namely that lwm (Lightweight Window Manager) does not have a built-in application menu. It can be also used for other window managers that either don't have their own application menu (such as lwm) or don't currently have a menu-method written for the Debian menu system.
FvwmPartition is a FVWM2 module that allows the user to build a structure of panes in a fairly arbitrary manner. Windows can be attached to these panes and manipulated together by dragging the bars that separate the panes. Windows in a specific pane can selected by tapping the labels on the parent bar or moved by drag-and-dropping the labels.