* bingbot

* AhrefsBot

* YandexBot

* Mail.RU_Bot

* YandexImages

* SISTRIX Crawler

* 360Spider

* Ask

* TencentTraveler

* Voila

* Baiduspider

* Ezooms

* Exabot

* MJ12bot

* Yahoo! Slurp

* YoudaoBot

* news bot

* Python-urllib

* Sogou web spider

* Nutch

* ia_archiver

* lwp-trivial

* msnbot