free to use, credits to author > https://forums.rpgmakerweb.com/index.php?threads/whtdragons-icons.57796/
also, check out his other stuff, its amazing
https://forums.rpgmakerweb.com/index.php?threads/whtdragons-tilesets-addons-fixes-and-more.60504/
sfml is a bitch, but even I can work with it, you should atleast try man.
I have easy wrapper function for drawing stuff, rest is just follow along code