I’ve been using the personal version of Nozbe for several years and extremely satisfied with the software. The founder (Michael Sliwinski) is a big fan of GTD and follows it methodically. He also knows David Allan fairly well. I’ve also his books and listened to his podcast. Source: over 1 year ago

I use Nozbe for this. I have some tasks that repeat daily, weekly or monthly, and which involved checklists. For example, every month I have a checklist that pop ups and tells me how to submit my tax return for my business or do a bank recon or my weekly review. I can also attach documents or screenshots to my tasks to make it easier. I’ve used it for about 5 years now. Very happy with it. Source: about 2 years ago

* This is rather a lot of work just to be able to _add tasks on your phone_ while you're away from your desk or even just to sync tasks between what might be two or three desktops, and it's pretty clear they had more of an "enterprise environment" or a hosting service like InThe.AM in mind when they wrote it. Regarding that particular service, it is open-source but "Setting this up locally as a clone of Inthe.AM... - Source: Hacker News / about 2 years ago

2) Save those static "TODO" tabs to a task manager[1] and treat them as tasks. [1]: My one: https://github.com/naggie/dstask/ -- saving the URL in note means I can open the tab in a browser again in a command (open). - Source: Hacker News / about 3 years ago