The Isles of Mist

from the introduction:
Welcome to The Isles of Mist, a system-neutral hexcrawl exploration adventure designed for introductory through mid level play. The adventure is based around a hex map which contains numbered hexes each of which has a keyed locale associated with it. As the party explores the islands they will encounter these locales and discover mysterious artifacts, strange peoples, ancient dungeons, dangerous lairs and a whole heap load of treasure.

The Isles of Mist can serve as a stand-alone adventure and campaign setting or can be easily dropped into an existing setting in any cold, remote region. If using it in your own world simply modify the setting details as needed.