Ion is a tiling (no overlapping windows) window manager that also has PWM-style tabbed frames which can contain multiple client windows. These features help to keep windows organized and to switch quickly between them. Ion was designed primarily as an efficient and unobtrusive window manager for users who prefer the keyboard.
The Pure Perl RayCaster is a small simple ray-casting application written completely in Perl without using OpenGL or any other 3D API library. For the GUI, it uses wxPerl. It can load a 3D object from a file (in RAW format), display the object in wireframe perspective view, allow you to orbit and zoom your camera, and produce a user defined size ray casting image of the current view in a predefined color theme, with or without smooth shading. It is well suited for educational purposes, in order to study, understand, tweak, and try well known fundamental 3D computer graphics techniques.
Taprobane is a convenient GNU/Linux distribution based on Debian. It can be installed to a hard drive or used as a live CD. The philosophy of Taprobane is to bring in convenience without insulting the intelligence of the user. Its key feature is Saegiri, the configurable build system used to automate the creation of the entire ISO.