The 2.2.1 version of Swingdo for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is BHI Inc. The software lies within Productivity Tools, more precisely Timekeeping. We recommend checking the downloaded files with any free antivirus.
From the developer:
Swingdo makes managing your to-dos fun and intuitive. Just add a new todo and Swingdo will do the rest. This app will prioritize and schedule it in your to-do list.
You may want to check out more Mac applications, such as ThinkingRock, DesktopCalendar or PhoneAgent, which might be similar to Swingdo.