ReadEra is an educational and reference application designed to help users read, manage, and organize e-books. It has a powerful search engine that can help you find the books you need quickly and easily. The app has a wide range of features that make reading convenient and enjoyable. You can customize the reader to your preferences, including font size, line spacing, and margins. You can also add bookmarks, annotations, and highlights to your books. The app also has an in-app dictionary to help you understand words you don't know. It also supports different file formats so you can read a variety of e-books. You can sync your library between different devices so you can access your books anywhere. ReadEra is free and available for both Android and iOS devices.
Discontinued The project seems to be no longer developed. The latest versions, released in July 2015, can still be downloaded from SourceForge and Google Play Store.
calibre
FBReader
Amazon Kindle
Google Play Books
Moon+ Reader
iBooks
Document Viewer
Cool Reader
Aldiko
EPUBReader
GoodReader
NOOK
AlReader
PocketBook Reader
Book Reader
BookFusion
Freebook Sifter
C.B.R. - Comic Book Reader
Bookworm
Discontinued The project seems to be abandoned. The last release was in January 2014.