http://wordpress.org/extend/plugins/page-tree/
Creates a expand/collapse tree for showing all your pages on your site
or in your administration "pages" panel.
http://wordpress.org/extend/plugins/latest-edits/
Adds a widget in your Dashboard which shows a list of the latest pages/
posts edits, so you can easily find where you were working last.
http://wordpress.org/extend/plugins/enable-media-replace/
Enables replacing attachment files by simply uploading a new file in
the media library edit view.