BeWelcome - Open your door to the world!
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Trustroots - Travellers community for sharing, hosting and getting people together.
Dudle - Dudle is an online scheduling application, which is free and open source.
Couchsurfing - CouchSurfing is your ticket to explore the world -- from the road or from your own home.
Smart Scheduling - Free scheduling software for spas, hair & beauty salons. Best online booking & calendar app. 100% FREE salon software. Try it Now!