2Do 2.8.6 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. 2Do for Mac lies within Productivity Tools, more precisely Timekeeping. This Mac application is a product of Guided Ways Technologies Ltd.
From the developer:
2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface and a comprehensive and flexible set of powerful features, it lets you focus on what's most important to you: your life. There is no wrong way of using 2Do, and unlike other to-do apps, it won't force you in adhering to a particular task management methodology.
You may want to check out more software for Mac, such as 2Day 2Do - Easy Timetable Planner or 2Day 2Do - Daily Activity Planner, which might be related to 2Do.