Thyrd is a concatenative programming language (hence the name, an obvious play on Forth).
Thyrd is a two-dimensional programming language heavily inspired by spreadsheets, in which opcodes are represented as icons.
Here is an introduction to Thyrd from the inaugural Emerging Languages Camp 2010. I still remember how it blew me away when I first saw this talk 14 years ago.
Here's an example of a Thyrd function, taken from one of the screencasts on the homepage: