Porner Bros is probably going to be hit with a lawsuit at some point by the media giant, but until then, you're free to look around and get your hands on some free porn. Note that while this particular tube is also featuring straight material, they have a gay area that allows you to only watch clips starring dudes fucking other dudes.
The homepage displays the latest clips and a feature that puts it above a few other destinations is the fact that you're able to see the scenes that stream in 720p. This means that the free tube has some HD content for you to enjoy and I'd say that at least 50% of the uploads are of this nature.
New scenes are added to the archive around ten times a day and they have sub-categories for you to filter by the content type you're specifically interested in. I think that PornerBros.com is actually a top tier destination and if they keep up their current ability, they're going to be doing pretty damn good things.