GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Numi App - Numi is a beautiful text calculator for Mac.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.