...and where can I get it?

When I click on some URLs (with file extension .hqx), I am offered the choice "open in Stuffit Expander (default)" or download. When I click on the Stuffit thing, it just opens in a text editor! When I download and then double-click, again, the file opens in a text editor.

There is no application called Stuffit or anything similar in my Applications folder. Where might I find it?

StuffIt Expander is "a freeware, closed source data compression software utility."

Finding the standalone version of Expander can be an adventure in circular navigation, but this URL should give you a direct download:

ftp://ftp.allume.com/pub/pub/mac/StuffIt/For_MacOS_10.4.x/StuffItExpander11.0.2E.dmg

Actually, the best place to get a hold of StuffIt Expander is to go to the following link:
StuffIt Expander StuffIt Expander

just a reminder

The Allume ftp download link does not work. Safari says it cannot load any data, and iCab downloads a file of zero kilobytes.

As I was reminded today when working at a friend’s house, downloading the latest version of Stuffit Expander does not get you a new Stuffit Engine. If you did not include it in your migration from Panther to Leopard (unsupported by Migration Assistant) you find yourself grateful that you did not erase the Panther volume.

May I ask how you happened to resurrect a thread from April 2007 without even having a relevant issue to post?

Just curious; thanks.

No wonder the ftp link does not work!

Maybe we can all have a little fun here now....