Dota 2 ping mods
The marker and the noise. Yours only, which is worth saying because pings are the one cosmetic people assume is shared.
The D2PFX catalog has 5 mods in this category. Each changes what you see on your own screen; everyone else sees their own game.
Love Ping
Love Ping II
Skeleton Black Ping
Skeleton Blue Ping
Skeleton Purple Ping
Installing any of these
Open Dota 2 Mod Manager, find the hero, press Install. The app puts the file in a free pak slot in the folder your game mounts, tells you when two mods carry the same file, and puts everything back after a Dota patch. The full guide, or the manual route if you would rather do it yourself.