RoRvsWild - All-in-one monitoring for Ruby on Rails applications. Track performances & errors for requests & background jobs.
Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
Framer - 🔥 Design real websites right on the canvas.
tota11y - An accessibility visualization toolkit from Khan Academy
Accessible Metrics - Digital Governance
Stark - Contrast check and color blindness simulator for Sketch.