If you are a "private" person and don't want your profile picture or name to appear on your friend's feed next to ads you liked, then follow this steps.
PIPA team working on a fingerprint authentication for basically anything. Take a look at this promising project that still needs your funding to go into the production.
The amazing timelapse is a beautiful composition of thousands carefully taken photos, shot in 36 cities and 21 countries, capturing the magnificent and prime examples of European architecture.
Google Docs or these days Google Drive can make collaborating with your colleagues or friends much easier by sharing Google Document, Spreadsheet, Presentation, Pictures or a whole folder.