http://www.desiringgod.org/resource-library/online-books/by-title
Resources in Different Languages:
English, Arabic, Burmese, Chinese, Filipino, Indonesian, Japanese, Thai, Telugu & more: http://desiringgod.org/resource-library/language-index
French, Russian, Vietnamese, German, Tagalog, Hebrew:
http://ow.ly/335B1
Resources by Topic:
Ministry - http://desiringgod.org/resource-library/topic-index/ministry
Missions - http://desiringgod.org/resource-library/topic-index/missions
Evangelism - http://desiringgod.org/resource-library/topic-index/evangelism
Church Planting - http://desiringgod.org/resource-library/topic-index/church-planting
Frontier Missions - http://desiringgod.org/resource-library/topic-index/frontier-missions
The Glory of God - http://desiringgod.org/resource-library/topic-index/the-glory-of-god
The Supremacy of Christ - http://desiringgod.org/resource-library/topic-index/the-supremacy-of-christ