Nuttx is a real-time embedded operating system (RTOS). It has a small footprint that is usable in micro-controller environments. It is fully scalable from tiny (8-bit) to moderate embedded (32-bit) systems. It also aims to be fully compliant to standards, to be fully real time, and to be totally open.
Endian Firewall is an all-in-on Linux security distribution that turns any system into a full-featured security appliance. It features a stateful packet inspection firewall, application-level proxies for various protocols (HTTP, POP3, SMTP), anti-virus support, virus and spam filtering for email traffic (POP and SMTP), content filtering of Web traffic, and a "hassle free" VPN system based on OpenVPN.
Slackware is the longest-running distribution of the Linux operating system. Slackware offers a stable and secure version of Linux that is perfect for home, office, or educational use. Slackware is easy for beginners to install, but contains all the advanced features required by the experienced UNIX power-user.
LPAR2RRD makes historical, future trends and nearly "realtime" CPU utilization graphs of LPARs and shared CPU usage of IBM Power servers. It collects complete physical and logical configuration of all servers/LPARs. It is agent-less (it gets everything from the HMC/SDMC or IVM). It supports all kinds of logical partitions (AIX/AS400/Linux/VIOS).
Briefly, FreeBSD is a UNIX operating system based on U.C. Berkeley's 4.4BSD-lite release for the i386 platform (and recently the alpha platform). It is also based indirectly on William Jolitz's port of U.C. Berkeley's Net/2 to the i386, known as 386BSD, though very little of the 386BSD code remains. A fuller description of what FreeBSD is and how it can work for you may be found on the FreeBSD home page.
Mnix is a free, simple, and fast i686 GNU/Linux distribution, aimed at experienced users. It is a hybrid distribution; both precompiled packages and sources are supplied. The main focus is keep it simple and to be as Unix-like as possible, using "Free Software" only. Mnix is installed as a basic system with console-only tools, which forms the base which lets the user build a customized distribution (and even remaster it). Its main features are: Free Software only, BSD-style init scripts, only one shell (bash), a simple package manager (mtpkg), a ports-like repository structure called "mars" (the Mtpkg Applications Repository System), a simple filesystem hierarchy which adheres to the Unix philosophy, kernel-libre-only sources, a set of libraries and compilers for the most-used programming languages, and a complete set of shell packages (installable from the ISO) to set up in 30 minutes (more or less) a fully working console-based system. Mnix GNU/Linux is suitable for the somewhat-experienced user who prefers console admin tools to tweak the system, who prefers to compile packages with custom settings, and who wants to customize the kernel for his own system.