Joplin
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
17 Alternatives To Joplin
Boostnote
Boostnote is an open-source note-taking app.
Draft
A tool for developers to create cloud-native applications on Kubernetes

Dynalist
Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.

Evernote
Bring your life’s work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Inkdrop
The note-taking app with robust Markdown editor, supporting macOS, Windows, and Linux.

Jama Connect
Collaborate with your team and share the data you care about in one place

NixNote
Unofficial Linux client for Evernote.
NoteLedge
Multimedia Notepad , Stay Organized and Make Beautiful Notes

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

Simplenote
The simplest way to keep notes. Light, clean, and free. Simplenote is now available for iOS, Android, Mac, and the web.
Standard Notes
A safe place for your notes, thoughts, and life’s work
Supernotes
The fastest way to take notes and collaborate with friends. Create notecards with Markdown, LaTeX, images, emojis and more. Get started for free!
Typora
A minimal Markdown reading & writing app.

Zim Wiki
Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
Zoho Notebook
Zoho Notebook is a simple note-taking app.
iA Writer
Minimal Design, Maximum Focus