Dylan is a
dynamic programming language created by a group within
Apple Computer. It was originally intended for use with Apple's
Newton computer but their implementation did not reach sufficient maturity to ship it as a product (though it did ship as a technology demonstration). However, the language design was intriguing enough that at least one company and a
university implemented
compilers and development environments for Dylan that were quite good.
The Dylan language is notable for being purely object-oriented: every value is an object.