https://www.quora.com/What-is-the-largest-commercial-program-written-in-Haskell https://www.quora.com/What-is-the-largest-commercial-program... I implemented a

https://www.quora.com/What-is-the-largest-commercial-program-written-in-Haskell https://www.quora.com/What-is-the-largest-commercial-program... I implemented a fractal zoomer, but it might be too simple to meet your vague "fully formed": https://github.com/serprex/Fractaler https://github.com/serprex/Fractaler