2GIS (reads as "DoubleGIS") is a free (as free beer) Geo Information System (GIS), developed in Russia. It has maps for cities: Astrakhan, Barnaul, Yekaterinburg, Irkutsk, Kemerovo, Krasnoyarsk, Kurgan, Nizhnevartovsk, Novokuznetsk, Novosibirsk, Odessa, Omsk, Perm, Samara, Tomsk, Tyumen, Ufa, Chelyabinsk. It also has GPS support.

Attention: wine package required to run this program.

Authors: http://fresh.2gis.ru/