I recently designed a new black and white wedding invitation 'Flourish'. Black and white wedding stationery can be a really great choice for DIY templates, especially if you don't have a color printer, or don't want to spend extra money on having color copies made.
However, some may find black and white a little boring, so how about black with craft paper?
I printed these out on craft card stock, and then to add some extra pizzaz I spray glued gold paper to the back. Pair with some gold envelopes and voila! Super swanky invites! Here are the supplies I used (I know this pic is pretty bad, but still, you get the idea) Spray glue, an x-acto knife, craft card stock, gold paper (about 50¢ a sheet) and a ruler:
The same could also be said for using brightly colored paper like this Fuchsia card stock. An unexpected paper selection can really add some wow. Go to a craft store and pick out a few sheets to try, don't be afraid to experiment.