If you're interested in sharing things you make with other people, you might want to check out Swap-Bot. So many choices! There are 65 swaps set up for Artist Trading Cards alone. (Here's a link to my previous post about ATCs.)
There are swaps for quilting, bookmarks, knitting, penpals, and many others.
My mom and I have been talking about doing our own ATC swap. We like that idea because we can choose our own theme and our own deadline. My grandmother has been having health problems, so I'm not sure my mom can manage doing anything right now, but I am putting a surprise ATC in the mail to her today. Sssh, don't tell!