Based on our record, Expresso seems to be more popular. It has been mentiond 2 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.
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: about 2 years ago
Typora - A minimal Markdown reading & writing app.
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
rubular - A ruby based regular expression editor
MarkText.app - Mark Text is a Markdown editor for Mac, Windows and Linux.
regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.