Ebook Management software.

Recently I have been searching for an opensource ebook management software that supports all sorts of document types ( such as pdf, epub,mobi etc...). Then I found a nice ebook library software called calibre. Only weights 32 mb and has a nice interface. more importantly you can store your ebooks based on the genre and has the bookmarking capability. Try it out, you will have a whole library with lots of ebooks that you never imagined. :)