Calibre is a powerful and easy to use e-book manager
Thorium Reader
Thorium Reader is an easy to use EPUB reading application.
MComix3
Ko e MKo ha tokotaha ngaue anga fakakaumeʻa, customizable ʻimisi. ʻOku fakataumuʻa pau pe ia ke ne tokangaʻi ʻa e ngaahi tohi fakaoli (ʻa e Comics fakahihifo mo e manga) pea ʻoku ne poupouʻi ha ngaahi founga kehekehe ʻo e faʻoʻanga meʻa (kau ai ʻa e FBR, FBZ, CB7, FBT, LHA mo e PDF). Ko e MKo ha Foka ia ʻo Comix.
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.