Autism

I haven't used it properly yet, but Goblin Tools is good for breaking down tasks into easier to manage pieces

https://goblin.tools/

It's not open-source but Trello is like an extension of my brain. Though it may only help if you understand how use a kahnban board and some basics of project management.

Many of the things we do can be projects. You just need to break them down into small more manageable tasks. This tool then helps you track all the task.

There is a open source version of trello out there I saw it on lemmy a few days ago. I'll post it if I can remember it.

It's not really a single tool but using Arch Linux helps me greatly since it gives me full control over my computing environment and it's look and feel.

The Tasks.org android app (and Astrid, its predecessor) have been my external brain for over a decade now. Reminders which automatically repeat on a configured interval (if necessary) are just extremely useful.

I don't use it for actual appointments with other people (dentist, game night with friends, etc.), those go in a calendar app^1^. But one-time reminders and everything that's even remotely on a timed interval (household chores, paying bills, scheduling car maintenance^2^, "check if a new book is out in that series I like"), those live in my tasks list.

I then use the Todo Agenda widget to show both calendar appointments and tasks in a single overview.

^1^: Google Calendar in my case, which is not open source. But something like NextCloud would probably work too.

^2^: The task is to make an appointment with my car guy. The appointment itself then gets put in my calendar app.

I like obsidian (a markdown text editor), it’s thousands of open source extensions, and some supplementary methods of using it like Build a Second Brain. Good rabbit hole to go down and come back up with something awesome.

I use Joplin to manage my notes and thoughts. I sync it to my Nextcloud (which I also use a calendar). I've been meaning to self-host habitica for my todos, but I just haven't gotten around to it yet.

Obsidian, free but not open source

EVERYTHING

throw a helpful file or folder into a random, unknown or “temporary” directory? Now you can search your entire hard drive…. And fast!

hledger which is a plain text accounting tool to manage my personal finances.

A wiki engine (mediawiki) has been quite helpful for me.

Not an app but a notebook close to my phone is awesome.

Its so easy for me to get distracted by the process of making a phone call. Sometimes I have to call back because I forgot something.

Whenever i get on the phone i have my pen in hand to catch stuff the caller is saying.

Sometimes I also write a brief outline of what I want to talk about and check stuff off the list as im talking to someone. This is great at doctors, attorneys etc.

Nextcloud has been instrumental for me to manage stuff in my life. I self-host it (many VPS's offer it as a one-click install), and it's how I collaborate w/my friends/family. I also use Appflowy, which is similar to Notion, I mostly use its kanban board functionality.