ZeGrapher is a free, open-source application for plotting mathematical objects in two dimensions. The official site describes functions, numerical sequences, parametric equations and data in the plane. Its visual interface is intended to let users enter expressions and inspect the resulting curves, making it a focused math plotter rather than a spreadsheet or a general-purpose programming notebook.
The public repository provides source code, build instructions and release information, with packages or downloads described for desktop systems including Linux, Windows and macOS. It also warns that the project is undergoing a substantial rework and that some features described in the repository may not yet be implemented. Users choosing a particular release should therefore check that release rather than assuming every documented option is available. ZeGrapher fits learners, teachers and technical users who want a dedicated way to explore graphs and compare mathematical relationships visually.
