The DB Browser for SQLite
Matplot++: A C++ Graphics Library for Data Visualization
Vici - create a UNIX script using a flow chart interface.
Draws signalling charts, block diagrams and graphs from text input.
Lightweight profiler library for c++
GTK+iostream, Data plots, ORB, Neural Networks, WSOLA
C++ Chart Library for wxWidgets
Qt chart widget.
Clint is a library for Qt projects to create charts, trees, etc.