µBook

µBook is an HTML, PDB, PRC, RTF, PML, RB and TXT reader that lets you read e-books the way you like them.

The viewing window can be of any size, which will affect the number of pages. It remembers the last page read for each book, the last book read and a list of previously read books.
Additional Annotations and Bookmarks can be added and reached easily. Annotations can be imported from exported to external files. The history of books read can be traversed backward or forward (like in a web browser).