The Lettermate is an address stencil that keeps your writing straight and aligned, as well as letting you decorate your envelopes with hand-drawn designs.
Custom Wedding Envelopes- Lettering/Modern Calligraphy. $1.75, via Etsy.
Custom Hand Addressed Envelopes for Any Occasion by KBsKaboodle
Snail Mail nice way to write the name and address. I like getting my Christmas card with a handwritten note much more than an email.