Short description of ActiveState ActiveTcl (Mac) 8.5.8.2: ActiveTcl from ActiveState is the industry-standard 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.