Reverse Image Search EnginesEdit
IQDB - *booru board searcher. Use it for anime images. It's probably gonna be the first thing you should use for source. Also has a 3D option.
SauceNAO - Pixiv image searcher. It's your second option if IQDB doesn't work out well. It also has a few anime screenshots. Pretty good hentai searcher, if you have a screenshot or gif image.
Ascii2D - Japanese 2D image searcher (read comments if you can. It also give source). Use it when both IQDB and SauceNAO fail.
WAIT: What Anime Is This - Anime Scene Search. Use any screenshot to search which episode, which second it is taken from. Works best with most anime since 2000. Also has a few second video preview of the results.
TinEye - General image searcher. Shit sucks.
Google - Drag-and-drop, keyword-entering magic. Turn to this if the others fail.
Doujin/Hentai Portals like doujinshi.mugimugi.org and g.e-hentai.org support file search, as seen in the right picture. Some of the board archives also support searching for posts with the same image hash. And remember, looking at the filename, recognizing artist/studio styles, and knowing the current airing season will really help you not look stupid.
Image Search Options is pretty nifty for reverse image searching too.
Overbooru - Huge list of *boorus
Danbooru (anime artwork) - The "original" *booru. A lot of *boorus scrape from here.
Konachan (anime wallpapers)
yande.re (high-res scans) - Used to be oreno.imouto.org.
Gelbooru (anime artwork)
Sankaku Channel (anime/manga/game images)
e-shuushuu (anime/manga/game images)
The Anime Gallery (anime images & wallpapers)
Zerochan (anime images & wallpapers)
Manga Drawing (anime/manga/game images)
Nekobooru (anime/manga/game images)
hdwallpapers 123hdwallpapers - 动漫高清壁纸
4walled -壁纸板刮板。板/ W /动漫为。
2ndRarfag - Enjoy.