Langademy (www.langademy.com) is a free language exchange social network, and it’s based on a timebanking system. Each user begins with 5 hours to practice the language he wants. If he speaks in his native language with someone that is learning the language, that time will be added to his account, so he can use it to learn another language.

Langademy has rooms for every language, and those rooms work using a Language Roulette system: the user enters a room and he is paired with a user that matches his filter. Langademy also provides a meetup board, where users can create or join existing meetups for a certain language