Glaze Software
Glazy
Digital Fire Insight
Online
Desktop
Now free. No longer developed, but still a very useful program.
Home page: Insight Desktop
History and Tips on Use: https://digitalfire.com/glossary/digitalfire+insight
GlazeForge
https://glazeforge.com
They have also taken out a US patent on how they optimise the glaze formulation, patent no US-11746040-B2.
To me, and anyone else with a knowledge of mathematical optimisation methods, this is just trivial optimisation problem, and not really worth a patent. The patent is just for the US as far as I can tell, and as it is for software it isn't patentable in Europe.
Dead Programs
There are quite a few programs that lived for a while and are now dead, including: CeramDat, Glazechem, Glaze Simulator, Glaze Workbook Software, Hyperglaze and The Matrix Glaze Calculation Software. Glazes included in Glazechem and Hyperglaze are now available in Glazy.