9. • PDF-Xchange Viewer
www.tracker-software.com/product/pdf-xchange-viewer
highlight, annotate and work interactively with PDFs
• Delicious
www.delicious.com
social bookmarking service that lets you save, tag and bundle useful
websites
• Qiqqa
www.qiqqa.com
storage and full-text searching of PDFs - interfaces with Mendeley
• Dropbox www.dropbox.com
cloud file sharing/storage