Sailfish OS is a descendant of Maemo/MeeGo/Mer. It's made by the Finnish company, Jolla for use in smart phones and other mobile devices. This entry was added November 22, 2012 with the initial announcement of Sailfish. Sailfish 1.0 was released February 21, 2014. Sailfish OS 2.0 was released March 2, 2015. Sailfish OS 2.1.4 was released February 20, 2018. Sailfish OS 2.2.0 was released May 31, 2018. Sailfish OS 3 was introduced in February 2018.