The OpenSSI project is a comprehensive clustering solution offering a full, highly available SSI environment for Linux. Goals for OpenSSI Clusters include availability, scalability and manageability, built from standard servers.
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.
A FOSS operating system that aims to meet NSA's TPEP TCB A1 evaluation standard while retaining application compatibility at minimal performance overhead.
Tynix is a real-time kernel for embedded systems with reduced memory availability (without external memory). The project intends to be very small, portable for a large amount of platforms and easily configurable.
lysis is working on a features rich home automation system that ranges from CAN-bus, 1-wire and RF up to a HTPC; both hardware and software are addressed to make the really smart home; the domotics will provide energy saving, comfort, flexibility, safety
An open-source and understandable C/Assembly monolithic kernel. A hobbie operating system ! Every passionate programmer is welcome to contribute.