Meeting Planner is described as 'makes it simple to choose dates, times and places for 1:1 or group meetings' and is an website in the Office & Productivity category. There are seven alternatives to Meeting Planner, not only websites but also apps for a variety of platforms, including iPhone, Android Tablet, iPad and Google Calendar. The best alternative is Doodle, which is free. Other great sites and apps similar to Meeting Planner are DFN Scheduler (Free, Open Source), Vyte (Freemium), FindTime (Paid) and ADoodle (Free).
FindTime shows what days and times work the best for you and the attendees when available using free/busy data. Propose your selected times to all attendees and allow everyone to vote and quickly come to a consensus. FindTime sends out the meeting invite on your behalf.
a simple service for you to organize an anonymous survey or vote among your colleagues or friends. If you have already used Make a choice feature at Doodle.com then you may consider ADoodle.org as an Anonymous version.