User Agent String.Com 

User Agent String explained :

StackRambler 2.0
StackRambler	Name : StackRambler
2.0	StackRambler version
Description:	Russian spider. Crawls the web for Ramber.ru, a search engine of Rambler Media
Last visit:	2010.12.07 10:56
IP address and host name	109.245.74.165 - net165-74-245-109.mbb.telenor.rs 79.120.0.177 - host-79.120.0.177.netbynet.ru 81.19.66.38 - robot5.rambler.ru 81.19.66.8 - 0 81.19.66.84 - robot01.rambler.ru 81.19.66.89 - robot03.rambler.ru 81.19.66.9 - 0 81.19.66.90 - robot04.rambler.ru 81.19.66.91 - robot05.rambler.ru 81.222.64.10 - ds701-002.eltel.net 95.106.96.171 - 95.106.96.171
All StackRambler user agent strings