Updates to Bluebottle
"Bluebottle is a powerful operating system developed in the Programming Languages and Runtime Systems Research Group, based on the Active Object System (Aos) kernel. The Aos kernel provides a compact runtime environment for the Active Oberon language, which supports active objects (threads) directly, and enables the construction of efficient active object-based systems that directly run on the hardware." You can read the changelog for the latest changes, and be sure to check the screenshot of the window manager.