You&#x27;re probably aware of Smalltalk already but in case you&#x27;re not, I think it might be of interest to you. There&#x27;s an open source implementation of Smalltalk called Pharo. They have a few screencasts and recordings of presentations at their website. <a href="http:&#x2F;&#x2F;pharo.org&#x2F;documentation" rel="nofollow">http:&#x2F;&#x2F;pharo.org&#x2F;documentation</a><p>Edit: Checked your profile. Going to say that yes, you almost certainly know about Smalltalk -- far more than do I.