I made NewtonScript, starting in 1992. (https://en.wikipedia.org/wiki/NewtonScript)

The other viable choice was to have application developers write everything for the Newton in C or C++. By giving them a much higher-level framework (Scheme/Self-like language + UI views/interaction + indexed object store) we were able to get more functionality into the product/ecosystem faster and more reliably. At least I think so. Also, we didn't have much RAM to play with, and were able to do some nice memory-saving tricks underneath.