I needed to save an OCR result as PDF. I searched the Internet for a library that saves searchable PDF, I found many free libraries but all of them were hard to implement or full of bugs. Also there was no support with the free stuff. Finally I ended up using leadtools, and it gave me the ability to recognize documents and save the results as searchable PDF. I recommend leadtools for these 3 reasons: 1. Easy to use. 2. Very useful help and demo projects. 3. Great support department who always answered even my silliest questions.