I think there is no 100% perfect tool that can give only genuine and legal ICO but still I am using some useful sites , bellow sites to research and get all information about particular ICO to invest in right ICO and avoid scams.Here is the list:
icoalert.com
crustcrypto.com
ICObench.com
ICORating.com
icobazaar.com
tokenmarket.net
icotracker.net

  I will advice you that pls study this all sites well before invest in any ICO because in the all above sites have much accurate and deep information about particular project.