Expresso might be a bit more popular than MarkdownPad. We know about 2 links to it since March 2021 and only 2 links to MarkdownPad. 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.
(Opened article in Reader mode in browser, copied it, pasted into Markdownpad, cleaned up article (removed image captions, MORE: lines), made the whole article a quote, and pasted here in the comments.). Source: almost 2 years ago
(I used http://markdownpad.com/ to quickly format the quoted article for posting here on Reddit). Source: about 2 years ago
Working in PowerShell (.Net regex) one of my favorite tools is https://ultrapico.com/expresso.htm. It does require registering for a free license but it's well worth it. Source: about 2 years ago
Then you need this or something like it: https://ultrapico.com/expresso.htm. Source: over 2 years ago
Typora - A minimal Markdown reading & writing app.
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
rubular - A ruby based regular expression editor
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.