Lightning Calendar - Organize your life — it’s about time!
Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
GMinder - GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.
Kin Calendar - The simple and connected calendar