byx

https://byx2000.github.io/curve-fit/

This is a powerful online curve fitting tool that supports fitting dozens of commonly used functions and implicit functions. It features a clean interface and simple operation. If you need to perform curve fitting but don't want to learn professional software like Matlab or Origin, you can try this tool.

https://github.com/byx2000/ImplicitPlotter

ImplicitPlotter is a command-line tool that can plot graph of any binary implicit function equation or inequality, supporting both Cartesian and polar coordinates.The plotting algorithm is based on interval arithmetic.Related paper link: https://www.dgp.toronto.edu/public_user/mooncake/papers/SIGG...

https://apps.microsoft.com/detail/9nh7xqts2qkh?hl=en-US&gl=US