Combined with dropbox or some other remote storage and sync tool across multiple devices, this works wonders. There is an org-mode app for mobile devices as well. Of course people who dislike emacs might have a problem but it's quite hackable and there is nothing to keep one from associated .org files with emacs and using emacs just for todo lists (theres only about 5 or 8 commands in org-mode that you really have to know to be effective).
I have always fancied learning org-mode, but I have had trouble finding a guide which doesn't assume I already know emacs. Do you have any suggestions?
I had problems with conflicting files in dropbox / google drive so I just have a single directory with all of my org files in it versioned with a private Github repo.
For private stuff I just use the :crypt: keyword org extension to encrypt that entry with my GPG key...
To make use of org-mode but use the familiar vim keybindings, I just use emacs with evil-mode, the vim emulation mode. It works great. I've searched for a vim-centered alternative to org-mode for a long time; this is the best way I've found.
I've used https://github.com/jceb/vim-orgmode for a while now for managing documentation written with org-mode. It gets the job done, but if my project's docs weren't written in org-mode already, I'd just use markdown.
vimoutliner (https://github.com/vimoutliner/vimoutliner) is also terribly mature and appropriate for a lot of tasks one might use Org mode for - certainly worth a look.
To have the latest orgmode version I use the `org-plus-contrib` package from :
http://orgmode.org/elpa.html
I'm not sure if you need to delete `lisp\org` first (orgmode is included with emacs).
I think you can also use git to keep orgmode up-to-date.
The Best To-Do List: Org-Mode
http://orgmode.org/