Smalltalk-80 implementation, runs on most Unix types and most places with a POSIX compliant library, well suited to scripting tasks and headless processing. Part of GNU Project of Free Software Foundation, FSF. [Open source, GPL] http://www.gnu.org/software/smalltalk/smalltalk.html
Smalltalk interpreter for GNUstep, used mainly as scripting framework to make scriptable servers or programs, to script GNUstep applications, or to talk to registered distributed objects, and work well with Objective-C. [Open Source, GPL] http://www.gnustep.org/experience/StepTalk.html
Makes programs for PalmPilot, other Palm OS handhelds. Development environment runs on Linux, MacOS, OS/2, and Windows 95/98/NT/2000. Cross-compiler generates executable .PRC files from source code. [Open Source] http://www.pocketsmalltalk.com/
To be a superset of Smalltalk-80 with optional variable typing, to allow typechecking of variables and static binding of methods. Typechecking helps ensure type-safe code. Static binding cuts runtime expense, for more speed. http://www.zenspider.com/Satori/
High quality development tools for Windows market: innovative, high-performance, small runtime image, fully multithreaded. Interactive development environment with no sacrifice of runtime performance and deliverable size: compact, fast, royalty-free execu http://www.objectconnect.com/
sharp-Smalltalk compiler implements Smalltalk to run natively on .NET framework, allows using classes from normal .NET programs; class library is mostly compatible with ANSI Smalltalk. [Open Software License] http://www.refactory.com/Software/SharpSmalltalk/
Makes S# multiparadigm dynamic scripting language having, as a main language, a superset/dialect of classic Smalltalk-98; a full redesign of Smalltalk, with transparent cross-language integration, component based deployment. http://www.smallscript.com/
Strongly-typed, full rework of Smalltalk-80. Advanced inlining type-feedback compiler makes it far faster than other Smalltalks, optional type system makes it easier to understand. History, downloads, documents, FAQ. [Open Source, Sun] http://www.cs.ucsb.edu/projects/strongtalk/