Another standout portfolio app for presenting photos and images, FolioBook has a clean, minimal, and nonintrusive design that's easy to customize with personal branding or logos, both in portrait or landscape modes. We especially like the ability to sync multiple Dropbox galleries as well as import images directly from a PhotoShelter account. Another helpful feature is the ability to share one portfolio across multiple iPads, and add music in the background of your slideshows directly from an iTunes account. A read-only mode is essential so that clients don't accidentally alter your settings. [$12.99; iOS]