MEE6 - MEE6 is a multipurpose Discord bot with moderation capabilities, leveling, Twitch alerts, and an easy-to-use online dashboard.
tota11y - An accessibility visualization toolkit from Khan Academy
YAGPDB - YAGPDB (Yet Another General Purpose Discord Bot) is an advanced configurable Discord bot providing a load of features for help with managing a server.
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.
Arcane - Leveling, XP, ranks, voice, role rewards, auto mod, reaction roles, custom commands, YouTube alerts.
Page Speaker - Modern web accessibility tools for agencies & webmasters