Two more free Smalltalks:

-  Smalltalk Express - the free version of what used to be Smalltalk V Windows

    http://www.objectshare.com/products/smalltalk/se/seinfo.htm

It sure looks old compared to Dolphin or other Windows specific Smalltalks, but
it makes it easy to package your applications. I wrote an educational program
for pre-schoolers with it.

-   Little Smalltalk - an older version is described in detail in a book by
                                that name (by Timothy A. Budd, Addison-Wesley,
                                Reading, Massachusetts, 1987. 280pp. ISBN
                                0-201-10698-1)

     ftp://ftp.cs.orst.edu/pub/budd

This one is pretty much dead. A friend is trying to make version 4.0 work, but
there seems to be some stuff missing.

-- Jecel