MULTICULTURAL
Resources for Evangelism
Provides Christians around the world with the resources, in their own language, to fullfil the Great Commission and share the Gospel with non-Christians.
The Pocket Testament League Offers low-cost or free (sponsored by other members) pocket-sized Gospels of John in a wide variety of translations/cover styles, large-print, and in Spanish and Mandarin Chinese. Great for witnessing situations.
100 Languages.com has free, downloadable and printable tracts in 100 languages, and video-tracts of the "Good Person Test", by Living Waters ministry.
The Gospel in Japanese
WAY OF THE MASTER/LIVING WATERS is led by Ray Comfort and Kirk Cameron. This California-based ministry has one of the most complete array of resources for evangelism, evangelism training, and preaching available, including excellent tracts and training materials in English and Spanish (shipping costs are not cheap, so you can save more by ordering your tracts at once). The link above is to WOTM's video library of real-life street witnessing using their method of "Biblical evangelism". You will see many of the challenges and responses to a wide variety of real-life witnessing situations here.
GAYS AND LESBIANS
Printable Gospel Tracts from Jews for Jesus
MUSLIMS
ANSWERING ISLAM.ORG is one of many good websites which has resources for understanding the Muslim view of Christianity, being equipped to answer objections, and presenting the Gospel. Most of the site's resources are available in multiple languages.
SECTS AND NON-CHRISTIAN GROUPS
JEHOVAH'S WITNESSES