As the title says, I could use an exhaustive list of all Stack Exchange sites that use MathJax. If the list included any site-specific customizations made to the MathJax configuration on each site, that would be even better.
These sites support MathJax:
This list was complete as of 2014-01-17 and has been updated by the community since then. If you notice that this list has become outdated, please update it. Thanks!