Apple Notes - Apple Notes functions as a service for making short text notes.

textdif.com - Simple text comparison tool that's very fast and easy to use. Users can compare and email the comparison highlighted text.

Obsidian.md - A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.

Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.

OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.