eXept Software AG
- Home of Smalltalk/X, and other products and services.
- http://www.exept.de/

Genify: Smalltalk MT
- Compiled Smalltalk. Design and deploy fastest Smalltalk applications available, head-to-head with C/C++, no compromise. Many samples, subscription library for serious development. Build Web servers, free-threaded COM components, multi-threaded DLLs and EX
- http://www.genify.com/

ChiMu Corp.
- Develops software and provides various consulting and training services, for Java and Smalltalk, to help build better information systems. Specialty: high-quality, object-oriented architectures and frameworks.
- http://www.chimu.com/products/index.html

Applied Thought Corp.
- Specialty: pure object-oriented software consulting, design, and development services. If you need Smalltalk programmers, Applied Thought is highly qualified. Download our game for your Palm Pilot.
- http://www.appliedthought.com/

Crafted Smalltalk
- A supplier of quality tools for the smalltalk developer.
- http://www.craftedsmalltalk.com/