RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
TheRightMargin - TheRightMargin is a smart writing tool.
Expresso - The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.
Analyze My Writing - Analyze My Writing is an online text content and readability analyzer.
rubular - A ruby based regular expression editor
Text Highlighter - Highlight words in your Figma files automatically