Most used by me

Anything Marathi
www.mayboli.com
http://www.maayboli.com/hitguj/messages/34/38.html
www.marathiworld.com

Unicode txt

www.chhahari.com/unicode/

Online Dictionary
www.dictionary.com

Any technical stuff
www.howstuffworks.com

www.whatis.com

Online code
www.codeguru.com
www.codeproject.com
www.programmersheaven.com

Hindi Song Lyrix
http://www.hindilyrix.com/

Hindi song MP3
http://www.apniisp.com/beta/

www.musicindiaonline.com

Neural

http://www.mindtools.com/

Online Radio

mms://69.26.220.46/RadioSuno

Finally :-)
www.google.com
www.about.com