X Desktops with a Development Framework
Plain Desktop Environments
- AfterStep: Window manager that combines flexibility with elegant look
- AntiRight: Lightweight scripted environment that uses the GTK+ toolkit
- awesome: Highly configurable, next generation framework window manager
- EDE: small desktop environment, built to be simple and fast
- Enlightenment: The Enlightenment Window Manager
- fluxbox: Lightweight WM with support for tabs
- FVWM: An extremely customizable window manager and some desktop applications
- GoFun: Lightweight Desktop Entry Specification based desktop
- IceWM: Window manager designed to be small, fast and lightweight
- LxDE: provide a new desktop environment which is lightweight and fast
- Matchbox: Environment for non-desktop systems, such as handheld computers
- MATE: MATE Desktop Environment is the fork of GNOME2
- ROX: ROX is a free, GTK+-based, fully drag-and-drop desktop
- UDE: attempt to create new WM with original Look'n'Feel
- WindowMaker: Window manager intended to work with GNUstep
- Xfce: Lightweight GTK+-based environment
- XPde: A Windows XP-like desktop environment designed for Windows users migrating to Linux
3D Desktop Environments
- Compiz: OpenGL-based 3D window manager to extend existing desktop environments like Gnome and KDE
- Metisse: Metisse 3D Desktop project
- True3D*Shell: open source 3D desktop environment
Classic Desktop Environments
- CDE: Common Desktop Environment, the traditional proprietary environment based on Motif
- TkDesk: TkDesk predates most of the environments on this page
http://www.freedesktop.org/wiki/Desktops/ site themes