The Tesseract Project is a suite of extensions that provide a global MVC framework to gather, filter and output data within TYPO3. It was started more than 10 years ago. With the progressive rise of Extbase and Fluid, plus the introduction of Doctrine DBAL, it has become less and less meaningful. Versions exist that are compatible with TYPO3 8 LTS, but none of the extensions will be ported to TYPO3 9 LTS.
Hypercube icon by Michael Senkow from the Noun Project