EBSCO e-books support standard screen readers. Much more information can be found on EBSCO's eBook Accessibility User Guide and FAQs page (Middlebury login credentials required).
JSTOR offers the following services:
For more information, please see JSTOR's Accessibility: A Practical Overview webpage.
Overdrive states explicitly that the Overdrive website is compatible with NVDA and Jaws. Additionally, the OverDrive app for Android, iOS (iPhone/iPad/iPod touch), and Windows 8/10 is compatible with most accessibility programs and apps (including native ones like Android Accessibility Suite, VoiceOver for iOS, and Narrator for Windows). You can use these screen readers to navigate the app, browse for content, and listen to audiobooks. Most screen readers will also read the text of an ebook, but this isn't fully supported and may not function ideally.
ProQuest e-books support standard screen readers. Using Adobe Digital Editions helps with screen-reader functionality, although it’s important to note that some e-books are simply PDF image scans without OCR, which of course is useless for any screen reader. Fortunately, these are not too common.
Springer provides no readily available information about the compatibility of their e-books with screen readers or accessibility tools. They do state that their website is compatible with recent versions of screen reading software, magnifier tools, operating system speech packages, and speech recognition software.