Pieter's Lipgloss, a python app for calculating recipes from UMF analyses. Currently still in development. The source code can be found here.
Version 2, which is faster and (hopefully) easier to install, can be found here.
Currie Grid Calculator
Tom's Currie Grid calculator:
Dan Lizotte's Glaze Formulator, a web application built using R for creating recipes from UMF analyses:
Specific Gravity Calculator
Jason Bruce's Specific Gravity calculator
Ceramic Chemistry Visualization
GlazeMaster 3 Downloads (now free, including FileMaker source)
Ceramics Web Search
Some other good resources to search for ceramics info: