SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.
Chart Maker Pro - Chart Maker Pro is an incredible software that allows users to create charts and graphs in a meaningful way.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Line Graph Maker - Create a line graph for free with easy to use tools and download the line graph as jpg or png file.
NumWorks - The graphing calculator that makes learning math easier.
Desmos - A beautiful, innovative, and modern online graphing calculator.