Street Preacher's Manual
Read Gerald Sutek's guide online free.
http://www.chick.com/articles/tableofcontents.asp

Power Evangelism
Notes from John Wimber's landmark book.
http://www.pastornet.net.au/renewal/journal10/b-wimber.html

God 101: The Abundant Life
A simple course showing God's key to the abundant life that Jesus promises every person. Several formats are available.
http://www.god-101.org/

Mercy Street Ministries: Street University
By Richard C. Hobbs, training in street evangelism (PDF).
http://www.mercystreet.com/university/

Concord Road Church of Christ: Evangelism Handbook
Surveys methodology, doctrine, apologetics, and Christian living (HTML, DOC, PDF).
http://www.god-answers.org/Online_Tools/Evangelism_Handbook/evangelism_handbook.htm

Lawbreaker
Challenges believers to contemplate the strength of their faith.
http://www.lawbreakerbook.com

Gospel Truth Publications
Features articles on various doctrinal issues.
http://www.gospeltruthandpublications.mysite.com

John Bunyan Online
A free PDF version of the complete set of the George Offor edition of Bunyan’s works.
http://www.mountzion.org/bunyan.html