Couchsurfing
http://www.couchsurfing.com
El Nacional (Caracas - Venezuela)
http://www.el-nacional.com
Lonely Planet
http://www.lonelyplanet.com
Hospitality Club
http://www.hospitalityclub.org
Nomadic Hands (Sydney - Australia)
http://www.nomadichands.com
EGEA (European Geographers Asociation)
http://www.egea.eu