WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
Chart Maker Pro - Chart Maker Pro is an incredible software that allows users to create charts and graphs in a meaningful way.
Numi App - Numi is a beautiful text calculator for Mac.
Line Graph Maker - Create a line graph for free with easy to use tools and download the line graph as jpg or png file.
Graph - Graph is an open source application used to draw mathematical graphs in a coordinate system.
Desmos - A beautiful, innovative, and modern online graphing calculator.