ValueGal

You might want to look at Qoppa Software's commercial products, as we have a variety of options to get your input into PDF that can be emailed: [LIST]Server: PDF Automation Server watches a port or input location, processes the input per pre-defined rules (such as stamping, markup, etc.), then outputs …

Qoppa Software builds and sell Java class libraries and components to help developers do many things with PDF files. They offer documentation and code samples, along with live demos on their website.

Check out the commercial Java class libraries from Qoppa Software. They are built to enable developers to do things to PDFs, including showing in browsers without downloading the file to the user.

Though it's not open source, check out the Java developer libraries from Qoppa Software. They offer source code examples and libraries and components that convert to and from PDF files (along with many other manipulations to PDFs).