Porter Sans was designed by Tyler Finck. Since 2005 he has professionally dabbled in Typography, Photography and Graphic Design. Now, with a portfolio of many fantastic typefaces, he has made Porter Sans available for free (one weight only).
According to Finck:
It was released on September 30th, 2013 after a somewhat lengthy love affair with handdrawn type creation. Some have called it the stout relative of Ostrich Sans, or the cleaned up alter ego of Elm, but with ten refined styles its personality is undeniably unique.
Porter Sans is an extended sans serif headline family. Porter Sans is entirely uppercase to provide a steady horizontal line and continuity across weights. Inline and Outline work best at large sizes (particularly on the web). The only free option is the Outline format, but the other weights are available at different price points.