I am looking for a software that would help me create a Hierarchical Task Analysis tree similar to this
It has to be freeware. Online or offline does not really matter as long as the offline version runs on Windows.
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TaskArchitect is designed to produce a task hierarchy quickly and easily, and will export a top-down or left-right view as a jpeg file for your report.
They offer a free version that can handle up to 20 tasks. More than that, and you will have to buy the full version.
A 90% student discount is also available.
Reviewer's note: This answer was originally written in a way that made it sound like the poster works for TaskArchitect. No disclosure was made. As such, this answer was edited and this note was added. Furthermore, a question to the original poster regarding their affiliation with TaskArchitect will be posed.