[jjjeffrey]

Does anyone know of any free software that allows you to manage and visualize tasks in the manner advocated in the article?

[saamm]

I may be reading the article incorrectly, but I feel like this could be accomplished with any calendar software (Outlook, Google Calendar, et c.)

[ZoFreX]

This is what I've started doing. I have a few boring and long tasks that don't have any urgency but do need to be done from time to time, and they kept getting dropped, for the reasons outlined in this article.

At the suggestion of a coworker I've started scheduling meetings on my calendar to block out time to deal with them, and so far it's working very well.

[newtoon]

It's not free but you could try finid-app.com.