GTK+iostream, Data plots, ORB, Neural Networks, WSOLA
Investing Returns on the Market as a Whole
C++ Chart Library for wxWidgets
WPF Plotting Library
Javascript Library for plotting stocks or other data type using HTML5.
Computer vision and image processing library for Qt.
Python API for the GOLEM Tokamak discharge database
LGPL WKT parser
Java4 realtime graph plotting with Swing or JOGL.