DPlot is an educational and reference application designed to help visual learners and professionals to easily create, analyze, and present data. It provides an intuitive user interface that makes it easy to produce publication-quality 2D and 3D graphs, maps, and plots from different types of data sources. With support for dozens of different types of data, including scientific and mathematical, DPlot makes it easy to visualize data in a variety of ways. DPlot also includes a wide range of powerful tools for data manipulation, analysis, and presentation, including regression analysis, data filtering, and curve fitting. Finally, DPlot includes an extensive library of visual elements, such as symbols, labeling, and formatting options, allowing users to customize their graphs and plots for presentation or publication.
Discontinued The project seems to be no longer developed. The latest version, 2.7.10.0, released in June 2015, can still be downloaded from the official website.
Latest discontinued version is 4.4.2 (2013) https://sourceforge.net/projects/graph/files/Graph/
Discontinued Discontinued but open source @ https://github.com/graphsketcher/GraphSketcher
Dplot is a plotting program, not a spreadsheet.