Smalltalk/X
Smalltalk/X is a free implementation of the Smalltalk programming language. For download, see [1].
Smalltalk/X is an implementation of Smalltalk.
Other implementations of Smalltalk.
The Smalltalk/X package includes IDE, debugger, compilers, UI builders and many other tools. In addition to bytecode execution (which is translated just in time to machine code), it also includes a Smalltalk-to-C compiler which can be used to generate binary executables without any bytecode engine and without any IDE. Although not normally used as such, it can be executed as a scripting language with a REPL loop. It is available for Windows, Linux and other Unix-based platforms.