I play in, or used to play in, a few bands. Most of them fall under the “punk rock” umbrella. When I’m talking to someone who probably isn’t very familiar with this umbrella and they ask what the band sounds like, I typically say, “We sound sort of like Green Day,” figuring this is a universally understood reference. One time I said that to someone and she said, “You’re in Green Day?”, as we stood next to a row of vending machines at my data entry temp job.
So yeah: all of these bands sound like Green Day. Click on the pics below for more info, sample songs, additional links, and more more more.