Workaway

Workaway is a platform that allows members to receive homestays and food in exchange for a pre-agreed amount of time per day of work. The opportunities on offer are varied and based in a wide range of countries around the world. Some types of volunteering available include gardening, animal-care, cooking and farming, as well as more specialist and niche help requests. It uses a subscription business model.

Gift economy - A gift economy or gift culture is a system of exchange where valuables are not sold, but rather given without an explicit agreement for immediate or future rewards.
WWOOF - World Wide Opportunities on Organic Farms, or World Wide Organization of Organic Farms, is a network of national organizations that facilitate homestays on organic farms. There is no central list or organization that encompasses all WWOOF hosts.
Homestay - Homestay is a form of hospitality and lodging whereby visitors share a residence with a local of the area to which they are traveling.
Hospitality Club - Hospitality Club was a hospitality exchange service accessible via a website.
CouchSurfing - CouchSurfing is a global hospitality exchange service accessible via a website and mobile app. Members can request lodging publicly or directly from other members, "hang out" with other members, or join/create events. Harassment is against the terms of service.
Hospitality services
Cultural exchange