I'm a huge fan of https://momentum.earth. It's the best GTD system I've seen online, and the infinite sub-tasking/grouping, where each grouping can be set to be done either sequentially or in parallel, either surfacing the next task or all the tasks in the "Next" list automatically is amazing. Throw in the review settings, and the big picture areas of responsibility? And end-to-end encryption? It's amazing. - Source: Hacker News / about 2 years ago

I think https://momentum.earth/ gets a few things right (no affiliation). - Source: Hacker News / almost 3 years ago

After reading David Allen's Getting Things Done, I use FacileThings. No, I don't always get to exectute on the things, nor cleanup my todo list, but it helps to have somewhere organized to store that todo list. FacileThings is not free however, about 100$ / year. Source: 8 months ago

FacileThings, my man: https://facilethings.com/. Source: over 1 year ago

There's always Facilethings (https://facilethings.com/), which I love when I'm doing digital GTD. It's the first truly, ground-up GTD-only app, but it's not for everybody and it's not for free (but VERY reasonably priced, if you like it). Source: over 1 year ago

If you are looking for an application that will "feed" you the next actions, try https://facilethings.com/ . I used that application for years and am still a huge fan. Source: over 1 year ago

Most todo management systems want to be able to cater to GTD, but they don't want to limit themselves to it because they want to attract non-GTD customers. The only app I've found that I think sticks really close to GTD is FacileThings. Personally, I use the org-mode package for Emacs and it handles GTD very well, but it is certainly not everybody's cup of tea. Source: over 1 year ago