Image from Digital Collage Sheets
I hope you are enjoying your Holiday today.
If you're looking for free collage images, I found a site that may keep you busy: Free Collage Sheets And Images Directory from Squidoo. This lens was created by Betsi Goutal.
I noticed that some of the free sites have not been updated but you can still download their free images.
I love the Letter & Addressed Envelope images above (Free Collage Sheet #4) from Digital Collage Sheets. I have purchased images from this vendor and their images are beautiful and of high quality.