Last week I was working on a logo design project for a popular Brazilian blog. One of the requirements was that the logo had to be simple, so I started looking for some references. One of the best sites about logos is Logopond. They simple have tons of logos on their website, but one of the biggest problems is that, sometimes, it's a bit hard to find an specific type of logo... in my case, one color logos.
Logopond was very useful for my logo project. I found amazing logos with some really clever and creative solutions for logos without using gradients or more than one color. Because of that, below I list some of the logos I found.