This Samsung ML-85G printer driver can print at the full resolution of 600x600 dpi, and at the maximum speed (about two times faster than the driver supplied by the manufacturer under Windows). It needs Ghostscript to convert your PostScript files into PBM images, piping the output directly to the driver. The driver runs in user space, but calls iopl(), so it should be set suid root to execute transparently.
The Qt XInput Extension is a C library adding support for XInput devices (like tablets or joysticks) to Qt-based X11 applications. QXi supports devices with up to six valuator axes in absolute mode, up to 32 buttons, and any number of keys. It is built using autoconf and libtool, and comes with a simple example application.
QStick is a program which uses the XTest extension in XFree86 to send keyboard messages to an X server from a Linux-supported joystick. The program consists of the KBStick executable which reads joystick input and dispatches keypress messages to X, and the QStick shell script which configures environment varibles read by the executable to assign X KeyCodes to the joystick directions & button presses.
lcccd14 is a kernel driver that gives normal user level programs the ability to communicate with the astronomical camera "OES LcCCD14". The module provides ioctl() commands for operating the camera electronics, setting up the cooling stage and controlling the integration of the image. It is intended to write a SANE backend later on that uses this module.