Kernin is an easy-to-follow, menu-driven script to help with the installation of a Linux kernel. This includes everything from extracting the kernel from its tarball through automatically changing the LILO configuration. Kernin is mainly aimed at inexperienced users that have no prior knowledge of kernel installation. Kernin can also help experienced Linux users save time when installing a kernel. Note that kernin is only compatible with LILO at the moment.
lcdmod is a kernel module for using HD44780 compatible LCD displays connected to the parallel port. The driver is based on a vt52 display, so output from commands can simply be echoed to the device file. It uses fast 8 bit mode, and supports user defined fonts and multiple wiring schemes.
The system call tracker is a Linux kernel module and supporting user space applications which allow interception of and possibly taking action upon system calls that match user-defined criteria. It allows you to set such rules as "tell me when someone tries to open /etc/passwd" and "if user '500' tries to connect to the network, fail the system call". It can also be thought of as strace on steroids.
uLan Driver provides 9-bit character message- oriented communication protocol that is transferred over an RS-485 link. The physical layer consists of one twisted pair of leads, and RS-485 transceivers. Supported hardware includes OX16C954 PCI based add-on cards, USB-to-uLan converters, the i82510 RS-485 card, or simple active converter dongle for standard PC RS-232 ports. The whole set of libraries and support tools is available for building embedded devices. They range from low level firmware boot-loaders and debugging tools up to object oriented properties browsing and manipulation and process data communication channels mapping.
The SRR Module (srripc) is a synchronous message-passing module for the Linux kernel versions 2.2.x, 2.4.x, and 2.6.x. This module provides synchronous message passing among processes and threads, queued asynchronous event notification (proxies), timed delivery of proxies and signals, triggering of proxies between tasks, and user-space interrupt handling. Synchronous message passing is a fast, flexible, and robust IPC mechanism, particularly useful for building modular systems. The SRR Module installs automatically and provides an API that allows for porting of applications between QNX and Linux.
Framework for User-Space Devices (FUSD) is a Linux framework for proxying device file callbacks into user-space, allowing device files to be implemented by daemons instead of kernel code. Despite being implemented in user-space, FUSD devices can look and act just like any other file under /dev that is implemented by kernel callbacks. A user-space device driver can do many of the things that kernel drivers cannot, such as perform a long running computation, block while waiting for an event, read files from the file system, access the network, talk to a serial port, and more.
Compressed caching is the introduction of a new level into the virtual memory hierarchy. Specifically, RAM is used to store both an uncompressed cache of pages in their natural encoding, and a compressed cache of pages in some compressed format. By using RAM to store some number of compressed pages, the effective size of RAM is increased, and so the number of page faults that must be serviced by very slow hard disks is decreased. The main goal is to implement this compressed caching in Linux 2.4 (2.5).
GeekOS is a tiny operating system kernel for x86 PCs. Its goal is to be simple enough for beginners to understand and modify, but realistic enough to be interesting and fun. The primary development environment for GeekOS is Linux or Windows using gcc, nasm, and the Bochs PC emulator.