Here's a free tool I made recently that might be useful for writers. The popular scriptwriting software Final Draft exports HTML, but it's 'preformatted', meaning all the line breaks and spacing are hard-coded. So, while you can insert it into a web page, it won't flow to fit different screen sizes, and tends to look terrible on mobile devices especially.
I've made a fairly eclectic set of stuff in recent years, from apps to hardware projects. Check out the list here.
Twas the night before Christmas, when Sally and Jimmy,
Were sitting in silence and watching the chimney.
The whiskey was out, the stockings were hung,
And they patiently waited for Santa to come...