Based on our record, MultiMarkdown Composer seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
First off, CriticMarkup is an "extension" to Markdown with syntax for addition, deletion, substitution, comment, and highlight. Knowing this might help you find tools which support it. I know MultiMarkdown Composer on Mac is one such tool. Source: almost 2 years ago
It is closer to Multimarkdown. As a pandoc GUI, it should be compared to PanWriter which is open-source is grown from within the pandoc community, where you can contribute to make it better. Also try the VSCode extension vscode-markdown-it-pandoc which applies the markdownit extension in PanWriter to VSCode’s markdown extension. Source: over 2 years ago
To those comparing to other softwares: It is closer to [Multimarkdown](https://multimarkdown.com/). As a pandoc GUI, it should be compared to [PanWriter](https://panwriter.com) which is open-source is grown from within the pandoc community, where you can contribute to make it better. - Source: Hacker News / over 2 years ago
Typora - A minimal Markdown reading & writing app.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Frost - An open API for Blockchain timestamping
Minimalist Markdown Editor - This is the simplest and slickest Markdown editor.