OpenSondage is described as 'Make your polls with OpenSondage. OpenSondage is a web based application that let you schedule a meeting or create a poll where all the participant can share their available time or preferences'. There are more than 50 alternatives to OpenSondage, not only websites but also apps for a variety of platforms, including iPhone, Android, iPad and Linux. The best alternative is Framadate, which is both free and Open Source. Other great sites and apps similar to OpenSondage are Doodle (Freemium), Dudle (Free, Open Source), Xoyondo (Free) and FullCalendar (Free, Open Source).
Omnipointment offers cooperative scheduling to find the best time for a group to meet. Key Features ------------------- Time Grids: Visually present dates/times. Times display in user's local time zone to avoid confusion.