The page exists mostly because I don’t think about these things often enough to remember their names but occasionally need to know them as punchlines.
Iverson and Whitney
Arthur Whitney is I think the creator of the odd ill-explained k and b languages which make impressive claims about performance and unimpressive claims about community, support and longevity. I think they are in the APL lineage as created by Kenneth E. Iverson.
A cute usable language. See pure.
The hoary old classic of esoteric languages, about which I am no authority. However, check out this homomorphic encrypted brainfuck machine.