A brief description of each implementation of Tcl listed in [Category Tcl Implementations]. ''(under construction)''

   * [Tcl] is the definitive implementation and is written in C.  The same code base can be used with different build options or targets, different sets of add-on packages, or different packaging (e.g. as a single binary file).  These variations are distributions of Tcl and are covered in [Category Distribution].

   * C, including Tiny, [Jim], [Picol], ...
   * Java: [Jacl], [Hecl]
   * JavaScript: [Tcl in JavaScript]
   * FORTRAN: [FEMTOL]

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[Category Tcl Implementations]