Nervous Industries
- Ongoing collaborative art exchanges and mail art projects. Users post objects to be sent out to participants and returned to the address of origin.
- http://nervousness.org/

Official Flat Stanley Project
- A journaling project in which schools create a paper doll, write a journal for a few days, and send it on to another school. Includes a list of partner schools and how to get involved.
- http://flatstanley.enoreo.on.ca/

20 things, 20 people, 20 days
- Online gallery showcasing the work of artists who create limited edition multiples for art swaps only. Photograph galleries of artwork from past swaps and how to participate.
- http://www.20things.org/

1000 Journals Project
- An attempt to follow 1000 journals throughout their travels, to see where they go, and that people do with them. Frequently asked questions, press reviews, and scans of journal contents and covers.
- http://www.1000journals.com/

Missing Presumed Found
- Interactive project comprising of a network of small black sketchbooks that pass between complete strangers. Intro pack for those who want to get involved, updates and sightings of their books, and frequently asked questions.
- http://www.missingpresumedfound.com/

Crosses.Net Mail Art Networking
- Information for many collaborative mail art projects, documentation, forums and links.
- http://www.crosses.net

Mail Art Consortium
- Includes mail art galleries, contact information, and member profiles.
- http://www.endustry.com/mailart/

From My House To Yours
- The journeyweb is collaborative internet project of poetry, mailart, email and other art forms from around the world on the theme of home.
- http://www.zyarts.com/journeyweb

Collaborative MailArt
- A collaborative adventure between national and international artists, using the postal service to relay the artworks.
- http://www.valweb.org/mailart/mailart.htm