Main development is being done on a machine running [Linux] by [Debian]
We have successfully compiled MolTalk under SunOS as well. Other Unizes might work.
GCC[1] with support for Objective-C
GNUstep environment[2]: only required packages are: gnustep-make and gnustep-base
StepTalk[3]: SmallTalk interpreter for GNUstep/Objective-C
see SourceCode on how to obtain the source code
see BuildInstructions on how to compile MolTalk from the SourceCode