Should It Be a Meeting? - Fun and easy way to find out if you really need a meeting ๐๐ผ
Taskful - Deadlines, meet your match.
Meetingbird - Powerful meeting scheduling and notes โ right in your calendar
Gone - An ephemeral to-do list
MEETING? - Don't leave your coworkers behind. YO for meetings
Calendarist - Time blocking companion for Google Calendar