Freemium

Evernote is a note taking application which keeps the notes taken in sync across all platforms using its cloud infrastructure.

Notezilla

Commercial

Notezilla is a sticky notes app for Windows.

Simplenote

Open Source

Simplenote is an easy way to keep notes, lists, ideas and more.

Tomboy

Open Source

Tomboy is a desktop note-taking application for Linux, Unix, Windows, and Mac OS X.

wikidPad

Open Source

wikidPad different from other notepad applications is the ease with which you can cross-link your information.

NixNote

Open Source

NixNote is an open source client for Evernote.

WizNote

Freemium

WizNote is a cross-platform cloud based note-taking client.

Leanote

Open Source

Leanote is a self-hosted note taking app.

QOwnNotes

Open Source

QOwnNotes is a free open source (GPL) plain-text notepad with markdown support and todo list manager for GNU/Linux, MacOS and Windows, that (optionally) works…

Microsoft OneNote

Freemium

Microsoft OneNote is a digital note taking and sharing app from Microsoft.

Zim

Open Source

Zim is a graphical text editor used to maintain a collection of wiki pages.

Joplin

Open Source

Joplin is an open-source free note taking and to-do application.

NoteLedge

Commercial

NoteLedge note-taking and management solution.

CherryTree

Open Source

CherryTree is an hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

ResophNotes

Free

ResophNotes is a fast note writing tool and a Simplenote client on Windows.

Piggydb

Open Source

Piggydb is an open source Web notebook application that provides you with a platform to build your knowledge personally or collaboratively.

The Guide

Open Source

Guide is an application that allows you create documents ("guides") which inherently have a tree (which you can modify as you please) and text associated wit…