You can also look at
www.aminet.net, but, make sure you d/l only the items that have a checkered ball next to them, as the ticks are for 68k only.
Actually, you are on 68K, perhaps you can do both in your case??
if you can use both types without emulation needed, then you have found a massive resource for d/l stuff for your os4.
There are other support sites also.