I have been looking for the some best technology that can used for Scrapping.

Currenly my project uses Perl:LWP with regex to scrape info. I find a lot of tools running under different platform. E.g. Perl HTML XML Parsers, Java, Jscript, .NET. and many many modules like Hpricot, ,Mechanize, Ruby, Ruby on rails.

Which one would be the preferred one ?

Perl or Ruby on Rails should do it fine, if I am correct. I don't have much experience here, so you should wait until another member answers.

Can u tell me whether which libraries can be used in Perl for scrapping except for scrapping libraries.How can i get those libraries.

thanks for the reply i will try this out.