Cron - Cron Calendar.
Shovel – Study Planner - Shovel – Study Planner is one of the most exceptional apps that is solving the problems of students while planning for study.
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
ClassUp - ClassUp is one of the scheduling apps that proves helpful for students to manage their class timings, notes and organize their tasks.
zcal - zcal is the fastest way to schedule every meeting for Free and make it personal.
List:Daily Checklist - List:Daily Checklist is one of the most-exceptional apps that makes its users punctual, consistent, and sustained them for a long time.