ScheduleOnce

ScheduleOnce is a SaaS-based scheduling service that adds more scheduling power to Google Calendar. ScheduleOnce helps individuals and businesses find a common time for their meetings quickly and easily, accelerating the pace of business and eliminating unnecessary email and phone tag. The service is free and does not require registration.

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Meeting scheduler for Gmail (firefox)
Free
Find common meeting times that work for all attendees in Gmail.
Windows
MeetingPlanner
Free
Plan meetings across multiple time regions.
Windows
Meeting Scheduler for Google Calendar
Free
Have a meeting scheduler integrated with Google Calendar.
Windows
Group scheduler for Firefox
Free
Schedule meetings directly from your browser's toolbar.
Windows
Meeting scheduler for Google Calendar (firefox)
Free
Find common meeting times that work for all attendees from Google Calendar.
Windows
Meeting Scheduler for Gmail
Free
Integrate a meeting scheduler with Gmail.
Windows