For those who like ebooks, Calibre is a great program that was created to manage pretty much any aspect of your reading files.
The list of features is pretty extensive:
- convert files from and to epub, mobi, LRF and supports input of several other formats including PDF, html, odt, rtf amongst others;
- syncs to mobile reader devices (seems to work well with the iPhone/Stanza and the Kindle);
- convert a news feed to an ebook;
- scans your computer to check for all supported ebook formats so you can keep them organized, download cover art and meta data;
- runs on Windows, Linux and MacOS X.
At the present moment the app is on version 0.5.3 and seems to be under heavy development. For me, file conversion from PDF to epub format went without any hitches and I was finally able to organize my ebook library under one program.