The goal of the GNU PDF Project is to develop and provide a free, high-quality and fully functional set of libraries and programs implementing the PDF file format (and associated technologies).
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Sub-License
Hold Liable
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.