βLogseq, note taking web based local only and GitHub-hosted
βTypora, a nicely polished Markdown editor β has the best support for math input I've seen
βObsidian, a split-pane Markdown editor focused on bidirectional linking
βZettlr a Markdown editor focused on publishing / academics
βRemNote converts your notes into spaced-repetition flash cards, similar to Ankiβ
βfoambubble, a family of VS Code extensions to help search + organize your notes
βNeuron Notes a neat Zettelkasten system written in Haskell, based on GitHub repos
βR Studio includes an awesome Markdown publishing experience, similar to Jupyter Notebooks
(coming soon) Athens Research, an open-source alternative to Roam
(coming soon, made by me) Noteworthy, which aims to be an extensible, open-source alternative to Obsidian and Typora, with a focus on wikilinks and excellent math support
βDendron, a hierarchical note-taking editor based on VS Code
βkb, a minimal text-oriented command-line note manager
βNotebag a minimal Markdown app with tag support
βJoplin, multiplatform (mobile, PC, terminal) has more features than practically every other note-taking app out there.