Cinnamon 2.8 the latest version of cinnamon desktop environment that will shipped with Linux Mint 17.3 “Rosa”. Many new features have landed in Cinnamon 2.8, and it will take a while for users to discover them. There is a lot of smaller stuff under the hood as well, and that is usually where all the cool stuff happens. The Cinnamon desktop environment is mostly known for powering the Linux Mint distribution, but it’s available for other linux distribution as well.
Cinnamon 2.8 still development and stable version will available on end of november 2015. For more details about cinnamon 2.8 you can refer to this page.