Artering

The exchange of goods or services between two or more people with creative or artistic skill sets and without any money actually transferring between parties.

1. "How much was that logo?

-I didn't pay anything for it. I designed a website for my friend, and she made the logo in return.
So you were artering?
-Exactly."

2. "If it weren't for artering, I wouldn't be able to afford my new high-tech easel... because I'm a poor artist."