I designed a deck of cards to help me play test a game I'm working on (check out the links below if interested), but the particular reason I think other DIY folks might be interested is that I'm releasing the card back design for use by anybody to copy, or modify for what ever purpose they want, commercial or otherwise. You can download the design along with the illustrator file at my site: http://www.matthewtross.com/2016/05/singularitydeck.html. This means you can design your own cards to integrate into the deck, or just use the design for a completely independent project.
Here's the card back design:
The deck itself is currently up on Drive Thru Cards (http://www.drivethrucards.com/product/189497/The-Singularity...), and I plan to post it to printer studio soon which means if you design your own cards to use with the deck you can get them printed by the same place. Let me know if you think I should publish the deck to any other print services.
If your interested in the deck itself you can check out more about it on my site or my post about it in the game design forum (I go into a bit more detail on the design of the rest of the deck):
I debated for a bit about making the design freely available, but I thought that enough people might find it useful, even if its just for jazzing up some cards they're printing.