Apps similar to Mars Notebook include Notesnook, which is open source with a free version. Other options are Zim, TiddlyWiki, CherryTree and Trilium Notes. Note-taking Tools like Mars Notebook are a crowded field, with more than 100 alternatives for Windows, Mac, Linux, iPhone and Android.
MemoMaster is a free outliner software to create, administer and reference texts and calculations in the familiar tree structure. It enables intuitive searching, browsing, and organization of information.
Germany
EU
TiddlyWiki for Windows. A unique non-linear notebook for capturing, organising and sharing complex information. ATWiki is an independent project of TiddlyWiki.
Noto is a modern writing app. With delightful interactions, powerful editing tools, and a beautiful design, Noto helps you capture the best of your everyday life.
Sorting Thoughts is a note-taking software for your personal information and knowledge management. It is designed to manage your thoughts such as moments of sudden inspirations, tasks, events, projects and anything else you may think of.
GermanyEU
Curio is an innovative and visual application for brainstorming, notetaking, and project management.
United States
Never forget another brilliant idea. Log, organize and track your ideas and more with the Idea Notebook.
Notebook is a personal notebook application. Its for storing notes, to-do lists, daily logs, things you want to remember, neat ideas you might do something with some day, cute things your children said, bad jokes--all the kinds of things you would write down now if only you had...
Take simple text notes. You can put them into folders to create your own quick, easy and robust file structure.
MixNote is a mobile note taking app, like a memo pad or notepad. Take note of every deserved thing, with text, ToDo, voice and picture.
China
SlimWiki is an easy to use Wiki / knowledge sharing platform for teams with a beautifully simple editing experience.
Thailand
Dashword is by far the most convenient and user-friendly tool for creating any semantic network, be it your business idea, an abstract of a lecture on computer science, a script for a movie or a recipe for your favorite dish.
FranceEU
Bike is a macOS (11 and later) native outliner. Bike has good performance on big outlines. Bike uses open file formats and is scriptable too. Use Bike to record and process your ideas.
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