I had skitch on my Nook Tablet, but it doesn't seem to show up in the store any longer. I do not see it when browsing my library from the Nook HD? Is it truly not compatible?
You can go to www.nook.com and search for 'Skitch App'.
Then click on the App link and see what it says on the page. IT'll tell you what devices it supports.
Can you not find this in Google Play Store? Does that work on Nook or not?