I’ve been a member of IconBuffet for quite some time now, and I feel I’ve amassed a decent number of icon sets. IconBuffet is like an Internet swap meet for icons; people have icons, want icons, and can trade icons for other icons. All the icons are royalty-free stock icons created by the members of IB, and many of them come in multiple dimensions. Some are grouped into “families,” where there’s a very similar style of pixel art between icons to go along with the name. There are a few other features I haven’t yet explored, but once I have time I can’t wait to do it!