languages

• https://en.wikipedia.org/wiki/Gutnish
• https://wals.info/

phonology

• https://r12a.github.io/pickers/ipa/
• https://en.wikipedia.org/wiki/Grimm%27s_law (i think this belongs here)

phonetics

• https://r12a.github.io/pickers/ipa/
• https://phonetics.ucla.edu/
• ipa mris and animations: https://www.seeingspeech.ac.uk/ipa-charts/?chart=1&datatype=3&speaker=1
• ipa real-time videos, occasional animation: https://enunciate.arts.ubc.ca/linguistics/world-sounds/