ReactOS is a free and open-source operating system intended to be binary compatible with application software and device drivers made for Microsoft Windows NT versions 5.x and up. Today the project announced the availability of the latest alpha release - version 0.3.16: "The ReactOS project is pleased to announce the release of version 0.3.16. A little under a year has passed since the previous release and a significant amount of progress has been made. Some of them include completion of the CSRSS rewrite and the first stages of a shell32 rewrite. 0.3.16 is a prelude to several new features that will provide a noticeable enhancement to user-visible functionality. A preview can be seen in the form of theme support which can be turned on to demonstrate the Lautus theme. Another user-visible change is a new network card driver for the RTL8139." Here is the brief release announcement. Download (MD5) the installation or live CD image from SourceForge: ReactOS-0.3.16-REL-iso.zip (75.5MB), ReactOS-0.3.16-REL-live.zip (53.1MB).