rubular - A ruby based regular expression editor

Scribbr - Scribbr is an online proofreading and editing service used for the academic activities of the students.

RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.

EditMyPaper.ca - Fast and accurate English editing for essays, general papers, research papers and manuscripts.

RegEx Generator - RegEx Generator is a simple-to-use application that comes with the brilliance of intuitive regex and is also helping you out to test the regex.

GradeProof - Proofreading with Artificial Intelligence