Text Giraffee has a cool logo generator that makes it very easy to come up with a logo design. There are 172 possible designs to select from, certainly, one of them will work for you. Each logo design is available for download in 5 different sizes - as transparent PNG files.
The nice thing about this site that it can give you lots of ideas on logo designs.
Customize your own free logo. Use the logo designer for anything you want! Wide variety of logos to choose from.