regular expressions 101

Regex101.com is an interactive regular expression console that lets you debug your expressions in real-time.

Axe Html Reporter

Creates easy to read HTML file from axe-core accessibility results object

contrast ratio

A tool to calculate the contrast ratio between any two valid CSS colors.

Color Contrast Analyzer

Great tool for checking color contrast for both text and images of text.

Accessibility Insights for Web

Accessibility Insights for Web helps developers quickly find and fix accessibility issues.

Axe Core

Accessibility engine for automated Web UI testing

JMeter DSL

Simple JMeter performance tests API

Semgrep

Static analysis at ludicrous speed.

PasteSafely

A Pastebin alternative