TaskPaper - Plain text to-do lists for Mac
Google Calendar - Spend less time managing your day & more time enjoying it
Thrive - Thrive is an intuitive tool to manage your business using the latest trends in Project Management, Dashboards, Customer Relationship Management & Accounting
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
Simply.Digital - Goals & Tasks - Todo list to track your time & help set meaningful deadlines
Sunsama - Calendar and scheduling for teams