Default App is a Mac OS 8 utility that allows you to open documents
matching certain file/creator types with the applications you specify,
instead of the applications that created those documents.

For instance, Default App can be configured so that when you double-
click a SimpleText document in the Finder, it gets opened in a more
powerful text editor, like Style or Tex-Edit Plus.
Or you can have Script Editor compiled scripts opened with Script
Debugger.
Or Internet Explorer documents opened with HTML Viewer. Well, you get
the idea.

More in the very well done included Read Me or here:
<http://www.merzwaren.com/da/>

Please notice that unlike many other shareware programs, you won't
receive any registration number or unlock code after registering
Default App, because there are no annoying reminder windows to
disable.

Compatibility
Architecture: 68k PPC

Mac OS 8 to 9.2.2