Sniper mods for Dota 2
What has been made for Sniper, what each one changes, and who made it.
There are 19 mods for Sniper in the D2PFX catalog. Each one is a cosmetic change on your own screen: nobody else in the match sees it, and your Steam inventory is untouched.

Sniper Ardalan Interdictor

Sniper Blacksail Cannoneer

Sniper Howling Wolf

Sniper Odogaron Armor

Sniper Dragon Lore

Sniper Full-Bore BonanzaCrimson

Sniper Full-Bore BonanzaGolden

Sniper Full-Bore Bonanza

Sniper Occultists Pursuit

Aghanim Ranged Attack

Blue Diretide Ranged Attack

Green Diretide Ranged Attack

Nemestice Ranged Attack

Red Diretide Ranged Attack

Sniper Ardalan Interdictor

TI10 Ranged Attack

TI12 Ranged Attack

TI9 Ranged Attack

Yellow Diretide Ranged Attack
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.