You can download it at http://www.xs4all.nl/~thebeez/4tH/download.html
What has been changed?
* A default 4tH directory can be defined by setting an environment
variable.
* Support for creating custom 4tH implementations.
* The multitasking environment is scriptable now.
* The library files concerning ANS Core Extensions, table searching
and
interpretation have been rewritten or replaced.
* About 95% of the CORE wordset is supported.
* Comes with an extensive library, featuring hundreds
of words covering ANS-Forth compatibility, user defined stacks,
lists, XLS files, "Festival" speech synthesis interface, etc. etc.
* Comes with a nice, 370+ page manual.
* Over 10,000 lines of Forth code and more than 100 example
programs!!
* Native packages for MS-DOS, MS-Windows and Linux.
Hans Bezemer