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.
Look on the sourceForge there is a set of API's to generate PDF's... I am sure they can provide a least basic PDF viewing. There was also a post on a javaranch forum about the different PDF viewer. The post was made by Benjamin LEONARD (an dammed good java developper & more over a frien of mine). I remember he gave 2 package to do so !