As you may know, Raspbian is a free and open-source Debian-based operating system for ARM boards like Raspberry Pi and others.
Recently, Raspbian 2015-11-21, still based on Debian Jessie, has been released, including support for Raspberry Pi Zero, which is the Raspberry Pi Foundation’s 5$ computers. Also, IBM’s Node-RED Internet Of Things software has been implemented, a new graphical package manager has been added and new GPIO Zero libraries have been added as well.
The software has been also updated, the Scratch text editor Epiphany web browser have been enhanced as well.