Wikiwix search engine now has an image search function.
They wrote a bit about some special features it has on the VP
Give it a try, report if you find anything very useful or very broken.
(Best to report on the VP I think)
For my part, I find it much less useful than Mayflower because there's
no metadata display, and also it seems to show lots of thumb results
to images that don't actually exist.
They've just been waiting in a mountain for the right moment: