Dxpc - The Differential X Protocol Compressor
- An X protocol compressor designed to improve the speed of X11 applications run over low-bandwidth links. Latest stable release is 3.9.1, 2007-02-07.
Enlightenment Themes
- Tons of themes for Enlightenment, a lightweight window manager, can be found here.
GNU Xnee
- A suite of programs that can record, replay and distribute user actions under the X11 environment.
Lynucs.org : Homepage - The Free Desktop Screenshot Archive - Linux Screenshots
- Archive of screenshots along with free and open source Linux applications for the desktop; the value-added feature of this site is the listing of applications used for each screenshot with links to other screenshots using the listed applications; a multilingual site.
Splashy Project
- A splash screen program for Linux and other Unix-like operating systems. N.B. This project supercedes the Bootsplash project. It runs completely in userspace, and therefore doesn't require any patches to the OS kernel. Latest release is 0.3.13, 2008-12-24.
The gDesklets Homepage
- A system for bringing mini-programs (desklets), such as weather forecasts, news tickers, system information displays, or music player controls, on to the desktop -- eyecandy for the desktop. Works on most of the modern Linux desktops (including GNOME, KDE, Xfce). Latest stable release is 0.36, 2008-02-21.
The xTeX Shell
- A simple TeX interface for the X Window system.
Themes/Freshmeat
- A master list of all themes-related projects on Freshmeat.net. Each entry provides details of the project, license information, and a link to the home page.
ThemesWiki
- Guides for designing web themes and templates on a wide range of Content Management Systems and related software.
X Display Manager - Wikipedia
- A comprehensive article about XDM, an optional part of the X Window System that is used for login session management. Lots of external links are included for further information. (2010)
X/Config/Resolution - Ubuntu Wiki
- Few bother with modelines anymore, but if you want to get the most from your monitor (or you're just a plain control freak) this is the latest, definitive reference. (2011)
Xps
- Process tree display and manipulation for the X Window System; latest stable release is 4.2, 2003-04-22.