Google Search: This is a free tool used widely all over the world. You can look up meanings of words or any information you would like to know by typing keywords on the Google search bar and hitting the enter key of your keyboard. And there you go: you will have information page links coming up.
Facebook: This is also a free tool where you get to post, like a post, comment and network with friends. You can also upload photos on albums and access as well as view your friends’ photos. Limit access to your Facebook account to friends only for security reasons.