A light desktop environment for UNIX operating systems.
EDE is fast desktop environment with familiar look and feel. It should work fine on slower computers too.
Tool for creating portable self-containing Linux executable
Statifier is a tool for creating portable self-containing Linux executable. Statifier create from dynamically linked executable and all it's libraries (and all LD_PRELOAD libraries, if any) one file. This file can be copied and run on another machine without need to drag all libraries
FreeMiNT is a free alternative OS kernel for Atari systems & clones
FreeMiNT provides the basis of a free TOS compatible replacement OS that can multitask. Used together with the free system components fVDI (device drivers), XaAES (graphical user interface widgets), and TeraDesk (desktop manager), it provides a modern user interface.
Industrial embedded Linux for Raspberry Pi
Nard is a software development kit (SDK) written from scratch for the Raspberry Pi family of boards. Unlike Raspbian, which primarily is for desktop use, Nard focus on embedded systems running day and night for years. It has many features requested by industrial users.
HellGate™ is commercial Linux-based system for routers. It's absolutely FREE to try. Also it can be used for FREE with some restrictions.
The NT POSIX C Runtime Library is an IEEE standard runtime library for the NT POSIX subsystem. It can be used as a complete replacement or a side by side alternative for what is shipped with the Interix SDK.