GPS based games on smart phones

Foursquare
Turf Wars
Geocaching
Zombies Run
Dokobots

Augmented Reality games
Ingress
GeoBoids

The best audio format

wav, the most widespred format, developed by Microsoft, lossless format, used in recording and editing stage.
aiff, developed by Apple, lossless format
mp3, widely used, but lossy format, 10% of storage space that a wav file requires.

Check differences of two text documents

http://www.diffchecker.com/

Augmented Reality open source development kit

The most popular one is ARToolKit, which is a vision-based tracking library used fiducial markers.
http://www.hitl.washington.edu/artoolkit/download/

Qualcomm Vuforia SDK https://www.vuforia.com/ which supports Android and iOS. Vuforia has an extension for Unity 3D.

in vitro, in vivo, in silico, in virtuo studies in biology

Researches in Molecular Biology use

• in vivo (Latin for within the living) observations of living organisms,
• in vitro (Latin for within the glass) experiments in controlled environments 
• in silico simulations performed on computers
• in virtuo analysis is experiments conducted interactively by a biologist in a virtual environment. It remedies the limits of in vivo and in silico approaches by combining the advantages of numerical simulations and natural interactions.