They're called Web Browsers
I've used many in the past decade.
Internet Explorer (only in the beginning, before i met other browsers)
Mozilla Firefox (from the beginning til a few months ago)
Opera (When Firefox pissed me off in 2007)
Safari (When I wanted to try something new)
Google Chrome (solved everything for me)
I prefer Chrome over Firefox because Chrome's design is sleeker, basic, has what I want and need, and has a fast start-up.