PekWM is a lightweight minimalistic window manager for the X Window System which aims to look nice while remaining small. PekWM has support for window grouping, themes, Xinerama, keychains and much more.
It is based on the aewm++ window manager, but it no longer resembles aewm++ at all. PekWM was written by swedish programmer Claes Nästen, with help from several other people.
PekWM is licensed under the GNU General Public License, which makes it free to redistribute and modify.
Get PekWM from http://www.pekwm.org.