Every time I want to make a logo for my project, I love using Google Fonts, and select a font, download the font, open Sketch.app, create a text field using that font, type my project's name, and finally export it to png.
Here is some crafts I'd made, for example:
So today I build Picas, which helps you generate these kind of logo.
Just go Google Fonts to find your favorite font name. Tell Picas the font name and it will automatically generate the logo with this font.
For retina friendly, the image is 2x large.
Hope to see the logos you create with Picas!