Plot2 2.7.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is a product of Michael Wesemann. The following version: 2.0 is the most frequently downloaded one by the program users. The application lies within Education Tools, more precisely Science.
From the developer:
Plot is a scientific 2D plotting program.
This project started in 1993 with SciPlot on NeXTStep and continues with "Plot" for OS X till 2007.
You may want to check out more Mac applications, such as Plot2 Pro, which might be similar to Plot2.