Dendron - Dendron is an open-source, local-first, markdown-based, note-taking tool built on top of VSCode. It supports all the usual features you would expect like tagging, backlinks, a graph view, split panes, and so forth.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Obsidian.net - Obsidian is an Action-Adventure, First-person Exploration, Puzzle and Single-player video game created and published by Rocket Science.

Notion Haven HQ - The Notion workspace you need to manage your life & work

Second Brain - Capture & organize everything in Notion.

Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.