Comment by bbkane

For personal stuff I ended up with https://mytasksapp.com/

It's simple enough for me to understand but has the following features I want:

nice simple UI where I can add stuff without too many clicks

syncs between phone and browser (requires $1.49/mo which I'm fine with)

Can make multiple lists

Can drag items around in the list

Can add a longer description and reminders

For tech side projects I use GitHub issues as TODO/wish lists

For work I use a Google Doc to plan out the days tasks and meetings (similar to todo.txt). Google docs is really nice for this because I can collapse headers to shorten yesterdays work and use checklists that I check off as the day passes. I can also scribble notes in a freeform fashion at the bottom. I dedicate a whole browser (Safari) just to this page so I can easily tab to it.

For work I use MSFT Todo for stuff I'd like to do "at some point when I get time" (it's approved by my company, unlike my personal Todo app)