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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. .
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A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
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Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
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All-in-one encrypted to-do list, habit tracker, journaling, life-tracking and notes app.
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Milanote is a note taking app for creative work.
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The most beautiful note-taking app across devices.
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Boostnote is an open-source note-takingโ app.
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TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.
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Simple and elegant notes app on your Mac.
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Apps/Tomboy - GNOME Wiki!
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DEVONtechnologies develops DEVONthink, DEVONagent, and other Mac and iOS apps for document and information management and web research.
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wikidPad is an application for storing thoughts, ideas, todo lists, contacts, or anything else that user can think of to write down.
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Simple and powerful note-taking & blogging platform.
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Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input fr...
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A fork of the original Notational Velocity with some additional features and interface modifications.
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QOwnNotes is a free plain-text notepad with markdown support for Linux, Mac OS X and Windows, that works together with ownCloud Notes.
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The Markdown-based note-taking app that doesn't suck.
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Note taking open-source application aimed to have both a simple interface but keeping smart behavior.
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Apple Notes functions as a service for making short text notes.
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MyInfo is the most versatile organizer for Windows.