I recently wrote about noturno, a Firefox add-on I wrote to help switching between proxy configurations.
Since a few people have been downloading this add-on, I decided it needed some loving, and went to /r/freedesign on reddit to get it a logo and some buttons.
In a few hours I got a reply from /u/wnhDanny with a nice logo for the add-on:
Here is my post in the subreddit: https://www.reddit.com/r/freedesign/comments/436pk9/requestlogoforfirefoxaddon/
So, if you do have that Free Software project that needs some designs and you are like me: no artistic talents, you could just check out reddit for a nice free logo some contribution :)