MarkdownPad might be a bit more popular than Slugline. We know about 2 links to it since March 2021 and only 2 links to Slugline. 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.
My general workflow for specs is to use a combination of two apps when I’m writing a first draft — I use Highland on my Mac (which is completely great) and Slugline on my iPad. Because they both speak Fountain, you can just cut and paste between them and preserve your screenplay formatting perfectly. Source: 11 months ago
If you're using a Mac, you can keep using Fountain with a professional application. Beat is completely free. Highland 2 and Slugline 2 have limited free versions. I got an old Mac Mini to experiment with Beat and am impressed with it. But I like Linux so use Fountain-Mode in Emacs with 'Afterwriting. 'Afterwriting does produce professional screenplay PDFs. Source: over 1 year ago
(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
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
Typora - A minimal Markdown reading & writing app.
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.