Our great sponsors
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RegExr
RegExr is a HTML/JS based tool for creating, testing, and learning about Regular Expressions.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
this blacklist was created for wordpress but if implemented it should work on comments on all platforms. not 100% foolproof but weeds out a ton of spam and is frequently updated. https://github.com/splorp/wordpress-comment-blacklist
For real, I've even slowly cobbled together my fair share, clumsily going back and forth with regexr until I nail it, but ones like this are a special kind of magic.