Calibre

Without a doubt, we have loved this software because of how easy it is to use and how useful it has been for us. We have been able to supervise communications between employees, customers, and suppliers, monitoring that our rules and policies are met at all scales, improving performance and productivity at work.

I don't know of any other product that does what Calibre does without costing an arm and a leg. If you have an .epub that you need to convert to .mobi or .pdf or many other formats, while having the ability to customize the metadata and even the source code, Calibre is the best tool out there.

Calibre is the right tool if you have a a need for a shared knowledge management system whereby users can collectively access a shared pool of digital content. It eliminates scattered resources that your user base may have and replaces them with a single repository with version management that serves all major devices. The only situation I wouldn't suggest using library is when you have vast digital media libraries that contain DRM. Calibre doesn't handle DRM well. We've largely avoided this problem because our library is from DRM free publishers.

Calibre is perfect for anywhere you need to maintain and organize a digital reading library that relies on multiple sources, formats and/or user devices. If you read on a single device and only obtain material through, say Amazon, this is a superfluous bit of software for you.

Calibre is excellent for those who want to just use one format to store all their ebooks. This way you can just rely on one program to view your ebooks instead of needing to install various digital viewers.