This is a start, making them available through a separate, online browser. Or you can download the whole archive, catch updates occasionally, and play them offline.
Sadly, some things I grew up playing (re: Multiplicity's Punch the Clown, and other Multiplicity Shockwave games) seem lost to time, but I'm glad to see a majority (i.e. Taco Joe, Lenny Loosejocks) are saved.
I've suggested Urbanoids in the past, but doesn't seem its up there yet.