Piwigo is photo gallery software for the web, built by an active community of users and developers. Extensions make Piwigo easily customisable. And, for icing on the cake, Piwigo is free and opensource.
You might notice that I'm posting a few horns in here that are actively for sale.
I'm doing that for a few folks that have been long-time contributors here.
The standard disclaimer applies: they're not my horns, I don't claim they're good or they're in perfect shape, etc.
If you want to list your horn, e-mail me at thesaxinfo-at-gmail.com and we might be able to work something out.