Some CKEditor, custom CKEditor plugin and cropVariant examples configuration for TYPO3 8
See https://www.slideshare.net/FransSaris/htmlarea-to-ckeditor-creates-presets-and-your-own-plugin for a some extra insides.
To test the FE rendering examples you need the Bootstrap package extension of Benjamin Kott, version >= 8.0.0(-dev) and TYPO3 >= 8.7(-dev)