ICQ is a cross-platform instant messaging and VoIP client. … Originally developed by the Israeli company Memorabilia in 1996, the client was bought by AOL in 1998, and then by Mail.Ru Group in 2010.That is famous app that million of people are using it but sometime you want to use these kind of messengers in laptop so we have alternative of ICQ Chat that can be access from any laptop or tablet 100% free and without registration.