<p>The <b>Factor programming language</b> is a <a href="http://www.concatenative.org/">concatenative</a>, stack-based programming language with <a href="http://concatenative.org/wiki/view/Factor/Features/The%20language">high-level features</a> including dynamic types, extensible syntax, macros, and garbage collection. On a practical side, Factor has a <a href="http://docs.factorcode.org/content/article-vocab-index.html">full-featured library</a>, supports many different platforms, and has been extensively documented.</p>
<p>The implementation is <a href="http://concatenative.org/wiki/view/Factor/Optimizing%20compiler">fully compiled</a> for performance, while still supporting <a href="http://concatenative.org/wiki/view/Factor/Interactive%20development">interactive development</a>. Factor applications are portable between all common platforms. Factor can <a href="http://concatenative.org/wiki/view/Factor/Deployment">deploy stand-alone applications</a> on all platforms. Full <a href="https://github.com/factor/factor">source code</a> for the Factor project is available under a <a href="https://factorcode.org/license.txt">BSD license</a>.</p>
<li>Screenshots on <a href="https://factorcode.org/factor-macosx.png">Mac OS X</a>, <a href="https://factorcode.org/factor-windows7.png">Windows</a></li>
<p>To download a binary, follow the link for the desired OS / CPU configuration. Binary packages are the recommended route for new users who wish to try Factor.</p>
<p><b>Source code</b>: available via <a href="https://github.com/factor/factor/">github</a> or <a href="https://gitweb.factorcode.org/">gitweb</a>.</p>
<p>Stable and development releases are built and uploaded by the <a href="https://concatenative.org/wiki/view/Factor/Build farm">build farm</a>. Follow <a href="https://twitter.com/FactorBuilds">@FactorBuilds</a> on Twitter to receive notifications. If you're curious, take a look at the <a href="https://builds.factorcode.org/dashboard">build farm dashboard</a>. You can also <a href="https://concatenative.org/wiki/view/Factor/Building%20Factor">build Factor</a> on your own platform from source.</p>