This column features an open-source software tool - called automatic device model synthesizer (ADMS) - that supports and simplifies compact model development, implementation, distribution, maintenance, and sharing. The intended audience is people in universities or CAD companies interested in contributing to the development and improvement of the tool. It should also help people whose main interest is using the tool to get a better understanding of how ADMS works internally. ADMS is available on SourceForge.net, one of the most popular open-source software development Web sites. It was developed at Motorola Inc., whose main interest is to support standardization of compact models.