title_body: Which ereaders support the EPUB3 format? The EPUB3 format is the "next generation" for the widely-used EPUB format. (the differences between this and EPUB2 are described in this question).
  
  Which devices today support EPUB3? Where can I find out information about EPUB3 support?
upvoted_answer: Some supported EPUB3 Readers are
  
  
  Helicon Books EPUB3 reader (for Andriod)
  Math jax
  Online ePub3 reader
  Gitden EPUB3 Book Reader (for Andriod and iOS)
  Kobo Aura HD (source)
  
  
  EPUB3 Support Websites
  
  
  EPUB3 Overview
  EPUB3 Support Grid