A list of many Christian Missionary organisations are listed HERE.
Joshua Project is a research initiative seeking to highlight the ethnic people groups of the world with the least followers of Jesus Christ.
Presbyterian Inland Mission is active in 18 regions within Australia.
Church Missionary Society is a mission agency seeking to proclaim the Gospel and serve God's people around the world & in Australia.
CROSS CUTURAL EVANGELISM
HERE IS LIFE is a good place to start regarding evangelism to those around you, including those from other cultures.
HEART CRY MISSIONARY SOCIETY has resources, sermons - Paul Washer - articles, etc.
SOUTH ASIAN CONNECTION is of particular interest to outreach to Asia, including Hinus, Muslims and Sikhs.
S.I.M. stands for 'Serving In Mission'. It is a community of God's people who delight to worship him and are passionate about the Gospel, seeking to fulfill the mission of Jesus Christ in the world.
ARTICLE BY 'CHRISTIAN FAITH'
Fred Hargesheimer and the value of missionary zeal by Terry Allen.