Pitstop Pro is the industry-standard tool for preflighting and correction of PDF files within Adobe Acrobat.  The possibilities are endless with what can be done to detect problems with PDFs and to apply fixes.

Pitstop Server takes all the capabilities of Pitstop Pro, but allows you to automate the process on a stand=alone server.  This enables complex and automated preflighting based on your rules.  Common fixes can be set up to be applied completely automatically.

Callas has excellent PDF tools that are a viable alternative to the Enfocus products.  We can help you figure out the best tool for your needs and build a solution around the Callas solutions.