http://iqdb.org/ (for searching for images on various sites)

http://www.gohentai.net/ (EPIC, its got doujins AND VIDEOS!!!)

http://junkuchan.org/

http://konachan.com/

http://danbooru.donmai.us/

http://gelbooru.com

http://r34.booru.org/ (rule 34 booru)

http://behoimi.org/ (cosplay)

http://wakku.to/ (higurashi)

http://xbooru.com/

http://otakulinks.net/

http://thedoujin.com/

http://g.e-hentai.org/

http://exhentai.org/

http://biribiri.techsuki.net/ (doujins)

http://loli.pant.su/ (doujins)

http://pant.su/ (doujins)

http://doujinshi.mugimugi.org/ (doujin info [no downloads])

http://www.hentai-foundry.com/

http://boinchuuloli.wordpress.com/

http://www.fakku.net/manga.php

http://www.fakku.net/

http://www.sankakucomplex.com/

http://moe.imouto.org/

http://konachan.net/

http://konachan.com/

http://www.anime-fanservice.org/coppermine/

http://anime-fanservice.org/

http://ecchi-domain.com/news.php

http://www.fakku.net/

http://onlineanime.com/

http://wetpussygames.com/

http://www.hentaimedia.com/

http://www.doujin-moe.com/

http://www.aerisdies.com/

http://www.sankakucomplex.com/

http://rule34.paheal.net/

http://hentai3xtreme.blogspot.com/

http://desudesu0.com/

http://chan.sankakucomplex.com/

http://www.jlist.com/

http://www107.sakura.ne.jp/~moemoe/index2.htm

http://www.masterbloodfer.org/index2.html

http://www.pixiv.net/mypage.php

http://www.hentaipalm.com/

http://www.hongfire.com/

http://doujinshi.mugimugi.org/index.php?P=LIST&T=ring&ID=3764&LANG=1&S=1&AGREE=YES

http://hentaigroup.com/site/#news75

http://www.gamesofdesire.com/