Aidan O'Rourke has placed a large number of photographs of Manchester locations online :
Manchester Images -- 1000+ photos ; thumbnails
Gallery - (Virtual Manchester) -- 100 photos
A QTVR movie of Gorton Monastery
Manchester School of Architecture Webcam
A Personal Picture Tour Of Manchester
Chorlton Images
Rebuilding Manchester
photos of the aftermath of the bomb, and subsequent rebuilding
North West Film Archive
The professionally recognised public home for the moving image heritage of the North West of England.
The Local Studies Unit at Manchester Central Library has digitised part of its collection of prints and photographs : they can be viewed (and purchased) on two public access terminals in the Unit, but they're not online at present (apart from a few sample images).