Pharo Smalltalk is a fork of Squeak Smalltalk version 3.9, initiated in 2008.
The intent of the project founder, Stephane Ducasse, is to create a professional Smalltalk Language IDE that supports his computer science research. The project has attracted some Squeak users, including the Seaside Framework project, which, as of 2009, is now developed using Pharo.
1.0 beta was released in July 2009.
The current stable version is Pharo 9.0.0 (as of July 2021). github 
Pharo manifesto
Better for the better
Beauty to learn from
Not backward compatible
Clean, lean and fast
The Pharo Consortium is an initiative that intents to get Pharo Smalltalk being a commercially sound option for supporting and promoting Pharo Smalltalk in the marketplace.
There is a Symbaloo Web Mix with links to Pharo Smalltalk resources available at:
See original on c2.com