romku

HelenOS is a microkernel-based multiserver operating system. By decomposing the operating system functionality into tens of isolated but intensively communicating userspace servers, it provides a computing environment that has several virtues such as flexibility, increased robustness, well defined explicit interfaces, and smaller complexity of individual components.

DragonFly BSD is a total rewrite of BSD. It has replaced nearly all of the core threading, process, interrupt, and network infrastructure with native subsystems. It has its own MP-friendly slab allocator, a Light Weight Kernel Threading (LWKT) system that is separate from the dynamic userland scheduler, a fine-grained system timer abstraction for kernel use, a fully integrated light weight messaging system, and a core IPI (Inter Processor Interrupts) messaging system for inter-processor communications.

BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.

CruiseControl is a continuous integration tool and an extensible framework for creating a custom continuous build process. It includes plugins for source controls, build technologies, and notifications schemes including email and instant messaging. A web interface provides details of the current and previous builds.