I use rotring pens used by many illustrators since they produce precise bold lines, I then tend to use a photo editing software like Gimp or photoshop to add colour or leave it in black and white.
Gocco printing for the illustrations & also I have been sowing newspaper and felt on them of late (even though that is really time consuming, as handstitching on card is hard!)
Paper, paper and more paper , LOL! I love paper! I also use glitter, embellishments, flowers, etc. I do have some pens I've been starting to use more - American Crafts makes them, I think.
I'm also all about the card stock. I occasionally use embossing powder, brads, stamps. I LOVE Ranger Distressed Ink. When I do draw my own designs I use Corel Painters.
I buy packs of erasers and carve them into stamps. FInding good inks relatively cheaply can be difficult though - does anyone have any suggestions of brands they use?
I design my cards, invitations, etc. on AutoCAD (a computer aided design program) and print them on cardstock with my awesome laser printer. :) I'm an interior desiger, and AutoCAD is the program I use to do design drawings. Not a traditional graphic design program, but it works for me!
I draw my cards using Bamboo Pen Tablet and then print it using water resistant ink on a thick paper. I am still new on this, so I haven't explore using stamps etc yet, but I will soon because it seems so fun!
Currently I am still learning how to draw on a tablet, it is pretty hard for me!
Maybe that's why my drawing is a lil bit childish :p
I draw them on a piece of watercolour paper, colour them with watercolours, scan, Photoshop them (my scanner eats the colours a bit !) and print them :)
I draw my illustrations using the mouse, but I have the intros-Wacom tablet that I still haven't used... I love to use good quality Neenah paper for printing all my cards and colorful envelopes.