There is snow melt and grit and cinders and kitty litter and rock salt (although that may not be around anymore for environmental reasons). The other day I heard a radio announcer suggest table salt. Sometimes there is just a residue of salt, but seeing it convinces me there's no black ice and it's safe to traverse that patch of sidewalk.
Above all, of course, there are the tractors that spread this stuff.
They may not be pretty, but they are our heroes.