These are the sound effects that the BBC is allowing developers to download and use...for FREE! Check it out.

Excellent color palette generator.

This is a list of some great cloud based DIY Graphic Design Tools. Canva.com is at the top of the list.

For all the real details, take a look at the actual xAPI specs

ADL Git Hub - LRS Conformance test and more!

xAPI Statement Validator from YetAnalytics. Put in your JSON to validate your statement.

A useful resource to learn more about xAPI

A great general resource about xAPI in general.

Have you ever wondered about the different types of file format for video? Turns out they are a lot more complicated than you might think. This article from VideoMaker does a great job of simplifying the complexities of .mov, .m4v, etc...

Interactive Advantage
Veterans of the e-Learning industry, Interactive Advantage offers consulting, authoring, and accessibility services. DHS Trusted Testers are on staff.

Section 508 Standards
This site contains information about Section 508. It also has links to many other resources.

WCAG 2.1 Accessibility Guidelines
This site contains the current WCAG 2.1 guidelines.

W3C Web Accessibility Initiative
This site contains guidelines, techniques, discussions and information on making web content accessible, as well as managing and evaluating accessibility.

This is a direct link to the Flow User Guide section related to creating accessible content in Flow, including keyboard navigation, best practices, and more.

This is a really great place to start if you're trying to understand how responsive design can help you tell stories, differently.

It has some awesome examples for inspiration plus a good overview of several responsive design options/effects/tools that you can use to help your content come alive and draw your learner in.