Org Mode Resources

This is not for the faint of heart. Most people will be perfectly happy with OmniFocus. But if you're of a technical disposition, or are prepared to tolerate some technical complexity in return for almost limitless power, then I would like to present the other option: Org Mode.

Org Mode is major mode in Emacs, a text editor which reaches back through over forty years of fanatical dedication and ruined pinkies. Org and Emacs will not hold your hand, but you get incredible flexibility to develop an entirely idiosyncratic task system. So, pop a red pill, chase it down with a dram or two, and take a look:

Getting to grips with Emacs

You won't get far with Org Mode without a basic understanding of Emacs. These are the resources I used to learn it:

Beginner

Intermediate

Advanced