These are accessibility tools that I use within my coding workflow. I also use VSCode as my main IDE and they have plugins that hook up into these testing tools.
Linters / Static Checkers: JSX-A11y, Axe Accessibility Linter
Scanners: WebAIM Wave, Lighthouse
Libraries: Axe Core, Axe Core React
Automated/Live Testing: Sauce Labs, Ghost Inspector
Here is the link to the guide to test for Keyboard Accessibility
Here is the link to test for Color Contrast
Able Player: https://ableplayer.github.io/ableplayer/
SplideJS (Carousel): https://splidejs.com/
Web Content Accessibility Guidelines 2.1 Standards: https://www.w3.org/TR/WCAG21/
Web Content Accessibility Guidelines 2.2 Proposal: https://www.w3.org/TR/WCAG22/
ARIA Authoring Practices Guide (APG): https://www.w3.org/WAI/ARIA/apg/
Americans with Disabilities Act (ADA): https://www.ada.gov/
Section 508: https://www.section508.gov/
US Web Design System (USWDS): https://designsystem.digital.gov/