The Self Language

Designed for expressive power and malleability, Self combines a pure, prototype-based object model with uniform access to state and behavior. Unlike other languages, Self allows objects to inherit state and to change their patterns of inheritance dynamically.

More information

Self: The Power of Simplicity explains the ideas behind Self and gives a brief language overview.
Programming as an Experience: The Inspiration for Self gives an overview and retrospective of the Self project.
The Self Programmer's Reference Manual (PostScipt file) contains detailed reference manuals for the language and the current implementation.