WebAIM

fantastic site packed with how-to accessibility information, including articles about making graphics accessible, how to structure information, and building accessible forms

Cheatsheets by the National Center on Disability and Access to Education

single-page guides to producing accessible files in several Microsoft and Adobe formats and captions in YouTube; a good resource for people who use downloadable files on their websites or in their course materials or who post instructional materials to YouTube

UA Libraries website

includes a page geared toward users with disabilities; a guide to using ZoomText that also offers descriptions of other available assistive technologies; and guides to accessibility features of Windows 7 and accessibility features of OS X 10.9 (Mavericks)

lynda.com

free to Tuscaloosa Public Library cardholders; offers online courses on a wide range of topics, including Advanced Accessible PDFs, Creating Accessible PDFs with Acrobat DCAccessibility for WordPress, and Foundations of UX: Accessibility

Video Captions & Subtitles

For Vimeo: Vimeo Captions and Subtitles, How to Sync Subtitles, The Anatomy of the Subtitling Editor