My Favorite sites
If you are looking for a lot of these places that offer digi stamps, there are 2 places that have a lot of the group of artists. They are Crafter's Digital Art Center and Outlawz. They will ask you to join but it is for free and you get to see alot of different artists' work. Paper Craft Planet will again ask you to join but you will get to see Mo's, Phindy's, Nanny Vic's work. So there are a lot to see. Free Digital Stamps offer daily freebies from a lot of these artists or will steer you to latest groups etc. You will find Dearie Dolls, Anne Fenton and Sandi Samples just to name a few.
Now, to answer the other question about Digis. You can download to pictures or documents. Copy them and use MS Word or Open Office and paste them. The fun come when you can shrink them, flip them or join them with other digis especially in the png form. You can do it in Jpeg but png is easier. You can also add your own Sentiment to the digis. Remember there are also coloring pages that you can also you as digis. Very versatile and require little storeage unlike wooden or clear stamps. Don't get me wrong I still use the former but also do a lot of digis. Hugs, and hope this helps. Josie