quiver works for me. I'm using it as a better photo viewer. Rotation doesn't seem to always work, it's possible to crash the program (it seems to be a problem with large, full-size images. Small ones work). But after some more testing it seems to still have some limitations that won't help for when you want to publish images: It can flip, rotate and zoom, but 'Save as' doesn't seem to be enabled yet. And the desktop version can crop images too I believe, but I don't see how to do that on the N800 version. In any case, as long as the result can't be saved it can't really be used for editing. But it is a _great_ image viewer! Much better than the built-in application.