*[PoDoFo](http://podofo.sourceforge.net/) - A library to work with the PDF file format. [LGPL]
*[Poppler](https://poppler.freedesktop.org/) - Open-source multi-backend PDF rendering library based on the xpdf-3.0 code base. [GPLv2/GPLv3]
*[Xpdf](https://www.xpdfreader.com/) - Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. [GPL v2/GPL v3]
*[DynaPDF](http://www.dynaforms.com/) - An easy-to-use PDF generation library. [Commercial]
*[QtVerbalExpressions](https://github.com/VerbalExpressions/QtVerbalExpressions) - This Qt lib is based off of the C++ VerbalExpressions library. [MIT]
*[c-smart-pointers](https://github.com/Snaipe/libcsptr) - Smart pointers for the (GNU) C programming language. [MIT]
*[cxx-prettyprint](https://github.com/louisdx/cxx-prettyprint) - A pretty printing library for C++ containers. [Boost]
*[DynaPDF](http://www.dynaforms.com/) - An easy-to-use PDF generation library. [Commercial]
*[gcc-poison](https://github.com/leafsr/gcc-poison) - A simple header file for developers to ban unsafe C/C++ functions from applications.
*[Kangaru](https://github.com/gracicot/kangaru) - A dependency injection container for C++11 and C++14. [MIT]
*[Klib](https://github.com/attractivechaos/klib) - Small and lightweight implementations of common algorithms and data structures. [MIT]