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

Memory - Self-hosted and open source note-taking app focused on minimalism and efficiency. Offers simple folder organization, keyboard shortcuts, instant URL formatting, and local media storage under /notes, reducing complexity in organizing thoughts.

Trilium Notes - Trilium Notes is a hierarchical note taking application.

SimpleNotes - "SimpleNotes" lets you create, edit and organize all your notes anytime, anywhere.

Notezilla - Colorful & powerful sticky notes app for Windows & Phones.

Fossify Notes - Introducing Fossify Notes – your ultimate tool for effortless note-taking, organization, and planning. Simplify your life with this intuitive organizer designed to streamline your tasks and ideas effortlessly.