Description: BookCrossing Core is an open source web application for tracking books across readers through a unique book ID or ISBN number. It allows readers to release books into the wild for others to find and register, supporting a book sharing community.
Type: software
Pricing: Open Source
Description: Postcrossing is an online project that allows its members to send and receive postcards from random people all over the world. It connects people across borders and cultures through physical mail.
Type: software