[pjungwir]

I don't see Chef [1] which was part of the MIT Mystery Hunt many years ago. If you have ever told anyone that programming and/or algorithms are just following steps like a cooking recipe, you should read about it. I don't think there was even an interpreter back then, so you had to "execute" the program by hand.

[1] https://esolangs.org/wiki/Chef

[codelani]

Very interesting! Added. Thanks!

There are a lot of esolangs still to add. It's helpful to have people recommend noteworthy ones.

[nils-m-holm]

Maybe you want to add Klong (K family, http://t3x.org/klong/) -- not necessarily eso, but not exactly mainstream, either. :)

Then, T3X was invented in 1995. And Klong in 2015.

[codelani]

Very cool! I love to see new array languages. Added. Thank you.