Attaching digital information to physical objects and locations is a growing trend. A few years ago projects like Semapedia or Yellow Arrow paved the way for other types of applications that are being developed today. Semapedia used 2D barcodes to link objects to Wikipedia articles, whereas Yellow Arrow used numeric codes attached to yellow arrow stickers that allowed publishing and retrieving information via SMS messaging.

As technology evolves and new services are born, these applications become a bit more sophisticated.

Stickybits stores digital content in traditional barcodes. Generate your own barcodes, or scan existing ones, and post your photos, videos, music, text or other files to them. The barcodes can then be sticked to anything from business cards, flyers, walls or  any other surface.

When someone scans a given barcode, all the content that has been attached by any user will be revealed, or, if none, a new reference will be created in the Stickybits database. The service will also notify you when a barcode is scanned, has new content or even changes location.

The Stickybits app is available for iPhone and Android devices, and the service is now opening their API for developers to create their own projects.

On a different note, Spotisquare, as its name implies, is a mashup of Spotify and Foursquare, that allows users to link song playlists to locations. The mobile web app will log you into Foursquare and will reveal if there is any music tied to a place or venue. If so, the browser will launch that playlist on Spotify. If not, for the moment, you'll have to use Spotisquare on your desktop to connect music to Foursquare venues.

http://www.stickybits.com/