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 ## C++
 
 * [GEOS](https://trac.osgeo.org/geos/) - GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).
+* [GDAL](http://www.gdal.org/) - Geospatial Data Abstraction Library (GDAL) is a computer library.
+* [Mapnik](http://mapnik.org/) - C++ library for rendering.
+* [Terralib](http://www.terralib.org/) - TerraLib is a GIS classes and functions open source library.
+* [Boost Geometry](http://www.boost.org/doc/libs/1_61_0/libs/geometry/doc/html/index.html) - Part of collection of the Boost C++ Libraries, defines concepts, primitives and algorithms for solving geometry problems.
 * [Capaware](https://en.wikipedia.org/wiki/Capaware) - 3D terrain representation with multilayer representation.
 * [libspatialindex](https://github.com/libspatialindex/libspatialindex) - C++ implementation of R*-tree, an MVR-tree and a TPR-tree with C API.
 * [Spatial](https://sourceforge.net/projects/spatial/) - Spatial is a generic header-only C++ library providing multi-dimensional in-memory containers, iterators and functionals.