This page is intended for templates and links to templates.

Deck of Cards Word doc template that is the standard Poker card size (for NPC's, Monster and Spell cards just taped to a regular deck of cards like this guy)

For the back add stat tents. One is at DM David's Blog that allows for the base stats.

There are some other free ones here (enworld is a great resource for many things).

I debated where to put these two resources and I believe here is the best places as they are simply templates for creating monster and spell cards.