ADRIFT (except for version 5)
AdvSys
AGT
Alan 2 & 3
Archetype (newly reimplemented for Glk from the original Pascal sources)
Hugo
JACL
Level 9
Magnetic Scrolls
Quest
Scott Adams
ZCode (all ZCode games except the Infocom graphical version 6 games).
Currently, more than 1600 games are detected and supported.
----
The only notable text adventure interpreter I can think of offhand that's not on this list is The Quill.
Testing it out though, I think it's got a few versions to go before it'll replace more focused interpreters - it won't load any zcode games distributed in the modern '.gblorb' format, and the decision to render all the text as white on searing blue, at 640x480, is... well, it sure is an accurate emulation of the experience of playing a text adventure back in the nineties, I'll give it that. Still, the breadth of support is super impressive!