GNUstep Live CD
GNUstep (this is a live CD, an operating system, a distribution) contains a lot of software for GNUstep, a free implementation of the OPENSTEP and Cocoa framework (which was also the base as Cocoa on Mac OS X). It includes an excellent application called Gorm for RAD (Apple Software Design Guidelines). More about the Objective-C Language. More on OPENSTEP and GNUstep. Why? The currently used window manager is Window Maker. Read this very informative article about what GNUstep is.
If you are an OPENSTEP, Cocoa developer and want to port your software to GNUstep and release it as Free Software, contact me. More what is questions answered. Still not impressed, read this? Read great documentation. Hopefully soon with a microkernel and a more usable approach to OS design. History about the Lighthouse Design Ltd..
GNUstep Live CD Official website
Download link to the distribution ISO(Download Link in Main Page)