BookCrossing Core is described as 'Open source project aims easy creation of your own bookcrossing site for sharing books in your country/region/company with multilingual support. Allows people to add their books into online library, release and track the journey of books' and is a Social Network in the Development category. There are four alternatives to BookCrossing Core for Online / Web-based. The best alternative is Project Gutenberg, which is free. Other great apps like BookCrossing Core are BookCrossing.com (Freemium), Postcrossing (Free) and swap-bot (Free).
Project Gutenberg is a library of over 60,000 free eBooks. Choose among free epub and Kindle eBooks, download them or read them online. You will find the world's great literature here, with focus on older works for which U.S. copyright has expired.
Do you like sending and receiving snail mail? Do you like writing letters, making crafts, or putting together fun packages? You should try swapping! Swap-bot is a online service that organizes group swaps and a community of creative individuals.