Debian GNU/k Free BSD was introduced as a "technology preview" along with squeeze (6.0). An unofficial Debian GNU/Hurd 2017 release happened June 18, 2017.
Debian 7.0 "wheezy" was first released May 4, 2013 and the eleventh and final point release, version 7.11, was released June 4, 2016.
Fedora 21 for Power was released December 17, 2014.
Fedora 21 for IBM System z was released December 18, 2014. Fedora 23 for aarch64 and Power were released November 3, 2015.
Debian users who want a more current desktop distribution are encouraged to use the testing branch, which is where the next stable release (currently codenamed Buster aka 10.0) is prepared and which should normally be quite stable.
Debian Developers and users who want to live on the bleeding edge can run the unstable branch (Sid) or even try packages from experimental.
These devices usually contain proprietary software, and some of the available apps are proprietary as well. Android 4.0 (Ice Cream Sandwich) is still running in some devices.
See the Android Open Source Project for the open source parts. Android 4.1 (Jelly Bean) preview was released June 27, 2012. Jelly Bean 4.2 started shipping on Google Nexus devices November 13, 2012; the SDK platform also became available. Debian GNU/Linux The Debian Project is one of the oldest distributions and is currently the largest volunteer based distribution provider.