LsdlDoom is a port of Doom, the original 3D shoot'em'up game. It is based on LxDoom, and includes all of its features such as network and joystick support, as well as some new ones. Its goal is to support all platforms SDL supports, and is currently tested on Linux and Windows. It has merged with PrBoom and LxDoom, which added things like OpenGL and other advanced features, that is available at prboom.sourceforge.net. The original version of LsdlDoom is still available if you just want doom, and dont need the fancy stuff.
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.
Lwpp is a lightweight text file preprocessor. Lwpp reads a file as input and writes sections of the file as output, based on certain conditions embedded in the file as preprocessor directives. Lwpp is meant mostly to emulate the C preprocessor's '#if[n]def ... #endif' functionality, but without any of cpp's other C-oriented features (including macro expansion), and without putting extra newlines into the output. Lwpp uses the environment as a dictionary of symbol definitions, so you can use the value of regular environment variables (such as HOME or HOST) as symbol definitions without having to define them again on the command line.