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+## Alternative UI
+
++ Transparent-floating toolbar (@gigaherz): 
+
+    https://github.com/gigaherz/pdf.js
+
+## Cool projects
+
++ Justin Bieber + Popcorn.js + pdf.js (@humphd)
+
+    http://scotland.proximity.on.ca/dxr/tmp/popcorn-js/plugins/pdf/bieber-demo.html