calibre – E-book management

This is a free and open source e-book library management application developed by users of e-books for users of e-books It Converts, lets you play with the metadata, upload etc. It's compatible with all the major ebook readers.
These are the main features:

• Library Management
• E-book conversion
• Syncing to e-book reader devices
• Downloading news from the web and converting it into e-book form
• Comprehensive e-book viewer
• Content server for online access to your book collection

Calibre Website http://calibre-ebook.com/