Africa Inland Mission (AIM)
P.O. Box 3611
Peachtree City, GA 30269
Since 1895, this Christian organization has been serving throughout much of Africa. Currently they are in over 22 countries. Their ministries include church planting and evangelism; education; medical work and HIV/AIDS ministry; community development and agriculture; theological education and discipleship; ministry to orphans and vulnerable children; aviation and logistics support — and much more.
AIM encourages short-term volunteers of less than one year and long-term personnel for a longer time frame.
Much more information is on their website.