Yes. TADS and Inform are 'pushed' as the only two adventure development
systems worth considering. This may or may not be true, because there
are many others. Judging by conversation on this newsgroup, though, they
seem about evenly matched in popularity.
The ftp site for the newsgroup (and a place where you can get an
evaluation version of TADS, as well as a complete Inform distribution
[it's freeware]) is ftp.gmd.de in the if-archive/ directory.
Alternatively, I maintain a Web page with the file descriptions for
ftp.gmd.de, linked to the programs themselves.
http://www.undergrad.math.uwaterloo.ca/~svanegmo
Either way, you would probably find the directories
infocom/info/
info/
programming/general-discussion
of interest. There's a detailed TADS-vs-Inform comparison, a summary of
the available systems, and some more.
/Steve