Sunsama is a daily planning tool from San Francisco, launched in 2017, that consolidates calendar, tasks, email, and Slack into one daily plan. It offers a 14-day free trial with subscriptions around $16-20/month for professionals and teams.
Launch27 is an online appointment platform for service businesses founded in 2014 in the United States, with built-in booking, calendar sync, and online payments for creating bookable landing pages.
Any.do is a cross-platform to-do app known for minimalist design and smart reminders, serving tens of millions of users globally across iOS, Android, Web, and more, with a free tier and Premium from about $3/month.