Compact Flash Linux Project is a Linux distribution designed to run on a compact flash card in read-only mode. It is as small as possible, and currently needs around 14 MB. It includes OpenSSH, quagga, iptables, hostap, madwifi, wireless-tools, pppoe, tcpdump, bridge-utils, and more.
DirectFB is a thin library that provides developers with hardware graphics acceleration, input device handling and abstraction, an integrated windowing system with support for translucent windows and multiple display layers on top of the Linux framebuffer device. It is a complete hardware abstraction layer with software fallbacks for every graphics operation that is not supported by the underlying hardware.
GeeXboX is a standalone media player Linux distribution, similar to MoviX. It's a small bootable CD that allows you to play your favorite video (DivX, XviD, H.264, MPEG 1/2, VCD, DVD, OggMedia, Windows Media, RealMedia, etc.) and audio (MP3, Audio CD, Ogg Vorbis, FLAC, MPC, etc.) files. It also supports networking, and is able to play media from Windows/Samba share, NFS, UPnP A/V Media Servers, RTP/RTSP servers, or SHOUTcast. It supports TV-out, TV tuners, DVB cards, and WiFi cards. It is based on MPlayer, and can be used on any x86, x86_64, or PowerPC computer. It's easy to modify the source to build your own GeeXboX or use an alternative boot method.
Gentoo For Zaurus is a port of the Gentoo Distribution to the Zaurus PDA. It can be mounted over NFS so no changes to a current configuration are needed. It includes a native gcc environment for ARM, the zgcc-3.3.1 cross compiler for the main PC with distcc configured so that the main PC does the actual compiling, and X11 for testing applications.
JayOS is a live CD Linux distribution intended for use as a more secure mobile environment. It uses GNU makefiles and Bash shell scripts to automate the building of a complete Linux distribution from source. The result is a turnkey solution for creating a compact, highly-customizable OS. JayOS includes many standard network security and filesystem tools, a full-blown development environment, and many programming tools and libraries including GCC, GDB, DDD, Perl, GTK+, Tcl/Tk, PHP, Ruby, Python, Qt, and Glade. It runs well on commodity hardware, and can be configured to run entirely from memory. In-RAM filesystem encryption with plausible deniability provides a more secure mobile workstation. It is based on Linux From Scratch.
wrt54g-linux is a mini-distribution for the Linksys wrt54g 802.11b/g access point and router. It includes basic tools such as sh, syslog, telnetd, httpd (with cgi-bin support), vi, snort, mount, insmod, rmmod, top, grep, find, nfs modules, etc. The installation script runs in about 20 seconds and installs strictly to the RAM disk. If you mess anything up, simply reset the box. After installing the distribution you'll be able to telnet in, add Web pages, change iptable rules, change routing, configure snort, etc.
MeeGo is a Linux-based mobile and embedded operating system. It brings together the Moblin project, headed up by Intel, and Maemo, by Nokia, into a single open source activity. MeeGo currently targets platforms such as netbooks and entry-level desktops, handheld computing and communications devices, in-vehicle infotainment devices, connected TVs, and media phones. All of these platforms have common user requirements in communications, application, and Internet services in a portable or small form factor. The MeeGo project will continue to expand platform support as new features are incorporated and new form factors emerge in the market.
OKL4 Microkernels are a family of second-generation microkernels based on the original designs and implementations by Jochen Liedtke. Originally implemented in highly tuned i386-specific assembly language code, the API has seen extensive development in a number of directions, both in achieving a higher grade of platform independence and also in improving security, isolation, and robustness. There have been various re-implementations of the original binary kernel interface and its higher level successors, including L4Ka::Pistachio, L4/MIPS, and Fiasco. For this reason, the name L4 now applies to the whole microkernel family including the L4 kernel interface and its different versions.