Joshua Project - Bringing Definition to the Unfinished Task
The purpose of Joshua Project is "to spread a passion for the supremacy of GOD in all things for the joy of all peoples through Jesus Christ" (borrowed from Bethlehem Baptist Church.) The mission and passion of Joshua Project is to identify and highlight the people groups of the world that have the least exposure to the Gospel and the least Christian presence in their midst. Joshua Project shares this information to encourage pioneer church-planting movements among every ethnic people group.
http://joshuaproject.net/overview.php

Joshua Project - Unreached Ethnic People Group Listings
A listing of people groups still unreached by the Gospel.
http://joshuaproject.net/unreached.php