GL2PS is a C library providing high quality vector output for any OpenGL
application. The main difference between GL2PS and other similar libraries is
the use of sorting algorithms capable of handling intersecting and stretched
polygons, as well as non manifold objects. GL2PS provides advanced smooth
shading and text rendering, culling of invisible primitives, mixed
vector/bitmap output, and much more...

GL2PS can currently create PostScript (PS), Encapsulated PostScript (EPS),
Portable Document Format (PDF) and Scalable Vector Graphics (SVG) files, as
well as LATEX files for the text fragments. GL2PS also provides limited,
experimental support for Portable LaTeX Graphics (PGF). Adding new vector
output formats should be relatively easy; you can also use the excellent
pstoedit program to transform the PostScript files generated by GL2PS into many
other vector formats such as xfig, cgm, wmf, etc.

Grantlee is a string template engine based on the Django template system and written in Qt.

Author:
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Stephen Kelly

Gwenhywfar is a base library used to provide OS abstraction functions for Linux, FreeBSD, OpenBSD, NetBSD, and Windows. It also includes some often needed functions (for example, handling and parsing of configuration files, reading and writing of XML files, and interprocess communication).

JSON is a lightweight data-interchange format. It can represent numbers,
strings, ordered sequences of values, and collections of name/value pairs.

JsonCpp is a C++ library that allows manipulating JSON values, including
serialization and deserialization to and from strings. It can also preserve
existing comment in unserialization/serialization steps, making it a convenient
format to store user input files.