C64 graphics gallery project maintains the aspired to have Commodore 64 high and huge graphics collection – showing as much graphical variety of the c64 world as possible from the mid 80’s till now.

C64 Pixel says on c64 portal :

Some of the content (i.e. commercial pictures) is only visible as registered user but otherwise all features are free to try.
If you are interessted in helping us filling it, please check this thread on CSDb about it.