Since it contains links to Freeware & Shareware from long ago, I'm sure there are indeed some Trojans in there, a long with a lot of good stuff.
Just like any other download site where the source is unknown, be careful, and you'll probably be fine.
Remember, these are old files with code that wouldn't raise an eyebrow many years ago, but today's security measures would consider them a threat even if they were OK back then .. and some of them may indeed be a threat.

When you play in that kind of a public sandbox, gotta watch for cat droppings ..

I do not work here, but the benefits are still awesome
Make your sound your own!