Many of my designs are listed under a noncommercial license, but you may print them for others (3d hubs, makexyz, etc), use them at trade shows, store displays, in pictures, or similar. Attribution would be nice, but is not required. Please do not sell the designs on commercial websites or mass produce them without contacting me first.
In general any home 3d printing under 100 units is fine, even if you are charging for it. What is not allowed is uploading it to Shapeways or similar sites to sell for profit or mass producing them for sale.