A well-known tool ;), https://chatgpt.com, and hundreds of possibilities: “GPTs” now available to all free (limited) accounts in the GPT4o version. Have you already spotted any that seemed interesting to you? First tests:

From @BastienMasse :
⁃ Grand oral: https://chatgpt.com/g/g-sXtt9X7w5-grandoral
⁃ Digest Document: https://chatgpt.com/g/g-nIBTnPYik-digest-document
⁃ Open image generator: https://chatgpt.com/g/g-s2WKCOPqI-open-image-generator

From @yannhoury :
⁃ Grammabot: https://chatgpt.com/g/g-vKoFEHooF-grammabot…
⁃ Prof_assistant: https://chatgpt.com/g/g-zaTYPoTdD–

– Tutor Me from @khanacademyfr : https://chatgpt.com/g/g-hRCqiqVlM-tutor-me…

– Exercises differentiated by V. The Scolan : https://chatgpt.com/g/g-BmCBefUsM-exercices-differencies…