调用GUNPLOT进行绘图的程序，GNUPLOT是开源的比较优秀的绘图的软件，科学界用的很广-mapping procedures, GNUPLOT is open source is superior graphics software, the scientific community is very widely used

Paint.NET也是大家相當熟悉的、也很愛用的免費繪圖工具。支援圖層管理、歷史紀錄、渲染與變形特效及各種色調、色階調整功能，是個相當簡單方便且實用的繪圖軟體。-Paint.NET is free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimi

Coral is an open-source visual programming environment to help artists and coders with rapid prototyping of CGI algorithms and workflows. The project is meant to be a community effort to maintain a free core technology, the aim is to have a powe