KeepNote is described as ': note-taking and organization. KeepNote is a note taking application that works on Windows, Linux, and' and is a popular Note-taking tool in the office & productivity category. There are more than 100 alternatives to KeepNote for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best KeepNote alternative is Notesnook, which is both free and Open Source. Other great apps like KeepNote are Zim, CherryTree, Trilium Notes and Tomboy.
Offers open-source, end-to-end encrypted notes with device-based privacy, cross-platform support, private vault, secure sync, offline access, markdown editor, exports to multiple formats, automatic backups, organizational tools, and strong encryption.
Zim brings the concept of a wiki to your desktop. Store information, link pages and edit with WYSISYG markup or directly typing some lightweight markup syntax and see it previewed as-you-type. Creating a new page is easy by either clicking on the "Create new note"...
Hierarchical note-taking software that is free, open-source, cross-platform. Features include rich text, syntax highlighting, multi-level lists, embedded files, customizable interface, code execution, PDF export, spell check, images & tables, and comprehensive project management support.
The original trilium is transfered to this repo by its owner and the app continues to develop here as stated here: https://github.com/TriliumNext/Trilium
Tomboy is a desktop note-taking application for Linux, Unix, Windows, and Mac OS X. Simple and easy to use, but with potential to help you organize the ideas and information you deal with every day.
RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries.
Opensource, developement not stalled
wikidPad is a Wiki-like notebook for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down. What makes wikidPad different from other notepad applications is the ease with which you can cross-link your information.
Ultra-ergonomic note app for Windows designed for efficient text capture from any application, file and image attachments, cross-device synchronization, hierarchic tagging, full-text search, encryption of notebooks, automatic backups, and offline use for enhanced safety.
Milanote is an easy-to-use tool to organize your ideas and projects into visual boards.
Web-based tool for integrating text, images, audio, and video with syncing across devices, real-time collaboration, handwriting input, AI-powered summaries, checklists, scanning, reminders, search in handwritten notes, and advanced organization.
Note taking open-source application aimed to have both a simple interface but keeping smart behavior.
Efficient hierarchical information manager for Windows, offering note storage in a single file with customizable tree structures, password protection with 1800-bit encryption, instant search, a rich text editor, multiple language support, and portable use without installation.
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This is currently the best alternative to KeepNote, lots of features, including rich text.