gnuplotlib
There are 3 repositories under gnuplotlib topic.
prasoonbatham11/cfcli
Command Line Interface for Codeforces
acorbe/gnuplot-cubic-hermite-spline
Cubic Hermite Splines in Gnuplot. C1 (continuous + continuous 1st der.) piece-wise functions made of cubic polynomials.
UlrichBecker/gnu-plotstream
Simple C++ interface for Gnuplot with stream ability like std::cout and so on.