Snail mail Pals

FriendsWithPens - Categories for friendship book and post card exchange, inmates, women, men and social networking.
International Pen Friends - Offers individual and school classroom memberships for a fee.
International PenFriends - US-based organization offering fee-based services for children and adults.
Just Write Letters - Offers links on topics such as letter writing etiquette, mail art and stamps.
Renaissance Private Connections - Meet new friends with this fee based service that includes a publication, personal listing and use of a private mail forwarding service.
The Letter Exchange - Anonymous pen pal listings in categories like Daily Life, Literature, and Ghost Letters (writing as imaginary characters). Subscription includes confidential forwarding.
Penpals.pl - Penpal listings from around over the world. Users may publicly post their email address and a list of their hobbies.
The Penpals Network - Free listings from around the world. Profiles include age, country, language, and a description.