This is an advanced 3D/4D graphing calculator which allows for the rendering of complex functions in a wide variety of coordinate systems, with a wide variety of options. For more information, please visit the following website, or investigate the extensive in-app help articles/tooltips. I also have a 'Getting Started' video that should be helpful.
To install the program, simply download the .zip file (from the Releases tab), and extract it to a convenient folder. Instructions for updating will be supplied in individual release notes, along with the changelog for the update. Here is a link to the latest release, and one for help interpereting the update instructions.
To run the program, your machine needs Java 1.8 (64-bit), and must be capable of running OpenGL 3.2 (packaged with the app).
If you're having problems running this application, please consult my problem-solver for potentially helpful information. You can also check the issues page, or post a new issue if no solution is apparent from that.
Activation Codes to unlock the advanced features of GCSD can be purchased here. Many features are available without an Activation Code.
By purchasing, downloading, installing or using* the program, you must read and agree to the Graphing Calculator SD End User License Agreement.⠀⠀*(For the purposes of the EULA, using GitHub or other tools to manipulate the Release files should be considered "using" and/or "downloading", and you must agree to the EULA in this case.)
Here's a pretty picture in the meantime. (More over here.)
There is currently no active public code.