INGENIUM potens et facilis est ut e-libro procuratori utatur
Thorium Reader
Thorium Lector facile est uti EPUB legendi applicatione.
Sigil
Sigil is a multi-platform EPUB ebook editor .
MComix3
MComix est user-friendly, customisable image inspectoris. Distinguitur speciatim ad tractandos libros comicos (tam Comicos occidentales et mangam) et varias continentis formas (including CBR, CBZ, CB7, CBT, LHA et PDF). MComix furca Comix eft.
CoolReader
Cross platform open source e-book reader.
Foliate
A simple and modern eBook viewer
Bookworm
Read the books you love without having to worry about different format complexities like epub, pdf, mobi, cbr, etc.