Flock
I just downloaded and installed Flock 0.4.9. Based on the Firefox browser, Flock at integration with bookmarking (del.icio.us), Bloging (I am writing this in Flock), and photos (Flickr). I have heard people say that the Flock's team should spend their time creating extensions for Firefox rather than creating a whole new browser, but it is nice to have everything in one package. For example, before now I have not used del.icio.us before, but now that it's in the browser, I use it.