[lug] any BNF syntax repositories?

[D. Stimits]

I'm curious about the use of BNF for various reasons, and wanted to know 
if anyone here has ever run across a *repository* of BNF syntax that 
centralizes this syntax for many computer programming languages? I.E., 
not a site with just C or C++ or Ruby BNF, but a site that is a BNF 
syntax reference for hundreds or more languages?

D. Stimits, stimits AT comcast DOT net