OpenQuest was me, about twelve years ago! I'm amazed people have kept it alive so long. Surely someone else can do something better that's written in the current version?
Thanks so much for creating OpenQuest. It's helped me a lot with learning adventure game programming - on multiple engines even.

Thanks so much for your open license on it as well.
I'm the person currently running
http://www.adventurepuzzledesign.com/ and archiving the OpenQuest AGS and SCUMM binaries and source code and I also converted it to the Wintermute engine a few years back.
It's a great demo for learning adventure game programming - it's small, but it has an inventory, verb bars, dialog tree that changes based on choices of dialog options, it has a custom verb and actions attached to it, it has two rooms and states that change in the rooms based on actions, inventory items that can be combined and modified, an intro and outro, and a cool little twist on the "reform an item from its pieces" puzzle.
That's what made it so attractive to the ScummC team and myself to convert it to other engines, as it's a great intro to adventure game design in general.