PSPP is a free software application for analysis of sampled data, intended as a free alternative for IBM SPSS Statistics.

GraphCalc is an open source software for Windows and Linux that provides the functionality of a graphing calculator.

Origin is the data analysis and graphing software.

Cacti is a network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality.

Graph is an open source application used to draw mathematical graphs in a coordinate system.