A couple more...
Angels Landing: http://www.angelslanding.com/stamps-crafts/
Pink Petticoat: http://www.pinkpetticoat.co.uk/cc_sw...flourishes.php
Sandra Dry Digi-Stamps: http://sandradrydigi-designs.blogspot.com/
Cute Daisy May: http://cutedaisymay.blogspot.com/
Character Cafe: http://www.etsy.com/shop.php?user_id=7226462
Christian Clip art (b&w images for free):http://www.watton.org/clipart/church/church.shtml
Coloring Page Tuesdays (free downloads): http://dulemba.com/index_ColoringPages.html#General
Charmed Crafts and Cards: http://www.charmedcardsandcrafts.co....Downloads.html
My Grafico: http://www.mygrafico.com/stamps/cat_95.html
Lindsay's Stamp Stuff (Lindsay Weirich): http://www.shophandmade.com/Store/Lindsay
Coloring Book (free downloads - images for kids): http://www.coloring-book.info/coloring/
I think that is all I have for now...sorry this is more than a couple - LOL!
ETA: Some of these are not digi-stamp companies, but if you are on the verge of trying digi stamps, you may want to start with the freebies and play around a bit. The digis work great with prismacolor pencils blended with baby oil. I print my images on Georgia Pacific cardstock and heat set once it comes off of the printer.