To manufacture pixels
Topaz AI Gigapixel - www.northlight-images.co.uk/topaz-ai-gigapixel-review/
On1 Resize - www.on1.com/products/resize/
Photozoom Pro - www.benvista.coms/photozoompro
Soft Proofing
http://www.hamiltoncolorlab.com/softproofing.html (Photoshop discussion)
Lightroom video playlist by Anthony Morganti
Glyn Dewis video on Lightroom Soft Proofing.