The Org Mode 9 Reference Manual: Organize your life with GNU Emacs

I'm fairly new to Orgmode, although l've been using Emacs for software development for many decades. Like most things in the Emacs universe, it is extremely powerful, but the learning curve is not trivial. Some things might be characterized as overly complicated. The manual is in the typical Gnu style: it starts at the beginning and plows straight through to the end, hitting every single last detail along the way without any sense of hierarchy or presenting the most important information first. But, this is a reference manual - there is a companion introductory guide available which is probably an easier slog for new people. (All things Orgmode may be found at orgmode (and then a dot) com. I wouldn't recommend Orgmode to someone who doesn't already know Emacs - the power comes from leveraging a lot of things you already know from Emacs. Trying to learn both Emacs and Orgmode at the same time would be a lot of work. If you want to use it for simple projects, there are easier things to use. But if you know Emacs and you have a complicated project with a lot of data sources, multiple pieces of code to compile and incorporate results, math formulae to format, or simply a lot of text to manage like a book, Orgmode is pretty amazing in its ability to organize and process these things.