==Useful sites==
Otaku-centered arthttps://danbooru.donmai.us/https://www.pixiv.net/ - (need an acount to browse)http://safebooru.org/https://yande.re/post - High resolution anime art including pools for artbookshttp://tsundora.com - Similar to yande.re and has high resolution anime art.http://konachan.com/ - Anime wallpaper booru.
Finding the source of an imagehttps://saucenao.com/ [good for manga]https://iqdb.org/ [good for works found on booru/pixiv]https://ascii2d.net [good for works found on twitter/pixiv]https://trace.moe/ [good for screenshots from anime]
if it's cropped these are the only ones that will workhttps://www.tineye.com/https://yandex.com/images/
Torrentinghttps://nyaa.si/ - for SFW torrents.https://sukebei.nyaa.si/ - for NSFW torrents.https://nyaa.pantsu.cat/ - less active alternative.https://coalgirls.wakku.to/torrent-listinghttps://animetosho.org - Anime DDL+NZB mirror
Hentaihttps://hitomi.la/ - Doujinshi and hentai.https://nhentai.net/https://hentaihaven.org/ - animated