官方发布的免费Tcl开发环境，包含许多有用的扩展包。
  Tcl是一种很通用的脚本语言，它几乎在所有的平台上都可以解释运行，功能强大。是tool command language的缩写.
The complete, quality-assured and ready-to-install Tcl distribution and Windows
ActiveTcl is the complete, quality-assured and ready-to-install Tcl distribution and Windows.

ActiveTcl offers you the most stable release of Tcl in binary form. It also includes several of the most popular extensions pre-compiled and ready to use.

Beginning with this release, we distribute and install the demos and examples of the various packages.

Here are some key features of "ActiveTcl":

· Complete ActiveTcl Package
· Tcl - Binary of core Tcl distribution
· Expect for Windows - Cross-platform system administration and test automation
· Extensions - Popular extensions, pre-compiled
· Easier installation - Self-extracting archives for all platforms
· Complete online documentation