This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Jasper reports has an extensive web site, and even its own Wikipedia page; I don't think there's much to be gained by repeating all that here. The reason to use it is the same as for all libraries: because it's easier or quicker than to program all that yourself.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com