Cesium

Warning
This is an old version - please use the latest one!

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Cesium is a shell for the TI-84 Plus CE / TI-83 Premium CE calculators.

Cesium is installed by running the CESIUM program.
This creates an application that can accessed via the apps button.
The application cannot be transferred to other calculators, however the installer can be used instead.

A video showing off various features is available here.