ActiveTcl from ActiveState is the industry-standard, commercial-grade Tcl distribution, available for Windows, Linux, and Mac OS X (Solaris, AIX and HP-UX available in Business or Enterprise Edition). Developers worldwide rely on ActiveTcl's completeness and ease-of-use, while corporate users protect their infrastructure and stay competitive with quality-assured ActiveTcl business solutions. ActiveTcl is 100% compatible with the reference distribution of Tcl. Code tested with ActiveTcl will run on any Tcl installation that has the appropriate extensions installed. ActiveState also provides business solutions for dynamic languages, including enterprise distributions and OEM licensing, that offer guaranteed stability, expert support, unparalleled quality and cost-efficiency to organizations.