Timeliness - Automatically schedules your tasks based on your availability
ReclaimAI - Helps users prioritize their work and personal calendars
Google Tasks - to-do list app that integrates with Gmail and Google Calendar
Atomic Life - Use AI to find open slots for a meeting from everyone's calendar and move things around if possible to find a good spot for everyone.
Amazing Marvin - Customizable personal productivity tool
Calm Calendar - Calm Calendar synchronises your events between calendars, while excluding private details.