Wide Area Network Emulator
WANem is a wide area network emulator. It supports various features such a bandwidth limitation, latency, packet loss, network disconnection among other wide area network characteristics.
Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.
Raspberry PI minimal linux distribution
Moebius Linux is a Raspberry PI armhf distribution built from scratch and targeted to have a small footprint. 20Mb of RAM (with ssh) and a 128Mb SD are minimum requirements. Size, speed and optimizations are main goals for this distro, take a look at it and contribute if you like it
Android-based Operating System (AOSP)
halogenOS test builds (release builds are just a leftover) The test builds and modules are supposed to be only used by our testers. But if you are not a tester, and use these builds anyways, don't expect support if you get problems. You can report the bugs, but you have to be experienced enough to know how to revert back to a working state and how to report bugs and provide logs.
Simple and flexible GNU/Linux distribution
Draco is an independently developed GNU/Linux distribution for i486 compatible computers, with focus on simplicity and flexibility. Draco has an distinct separation between the base system and third-party (provided by pkgsrc), the advantage of this approach is that the base system will work without third-party; And third-party applications are completely isolated from the base system, unable to break your system.
Bootdisk that allows you to play Nethack at any computer by just inserting the floppy and booting from it.
Small Linux from Network is a little Linux distro loaded from a network connection using a modified version of the DrakX (Mandriva Linux installer) loader. The OS image can be loaded from an HTTP, FTP or NFS server.