Eamon Adventurer's Guild Online
I am the webmaster of the this website in my spare time. Eamon is a text based RPG originally designed for the Apple II computer back in the early 1980s. The unique thing about Eamon is that the common person could sit down and design their own adventure for others to play. This allowed the system to expand to over 250 individual adventures; greater than number of Infocoms. However, since these are amateur efforts, most of the individual dungeons do not match the same quality as an Infocom adventure.
Eamon is pretty much a complete project and I doubt that anyone else will develop much for it. I wrote one of the last Eamon games, "The Sword of Inari". You can play it online using JAVA at http://www.eamonag.org/java/Java-246.htm. The rest of the Eamon world has pretty much ground to a halt. However, I'm quite proud of the website and the way it looks and would invite everyone to take a visit!