Collaborative tagging describes the process by which many users add metadata in the form of keywords to shared content. Recently, collaborative tagging has grown in popularity on the web, on sites that allow users to tag bookmarks, photographs and other content. In this paper we analyze the structure of collaborative tagging systems as well as their dynamical aspects. Specifically, we discovered regularities in user activity, tag frequencies, kinds of tags used, bursts of popularity in bookmarking and a remarkable stability in the relative proportions of tags within a given url. We also present a dynamical model of collaborative tagging that predicts these stable patterns and relates them to imitation and shared knowledge.
EtherPad is the only web-based word processor that allows people to work together in really real-time.
When multiple people edit the same document simultaneously, any changes are instantly reflected on everyone's screen. The result is a new and productive way to collaborate on text documents, useful for meeting notes, drafting sessions, education, team programming, and more.
Navizon is a software-only wireless positioning system that triangulates signals broadcasted from Wi-Fi access points and Cellular towers to help the users find their way in most major metropolitan areas worldwide.
The Navizon network is based on a collaborative database. Members with a GPS device can use Navizon to map the Wi-Fi and cellular landscape in their neighborhoods. Once they synchronize their data, it is made available to all the other users of the network. This way, users who don't have a GPS device can benefit from a positioning system. And it's free for personal use.
This project is an open source project, aiming to create a complete database of CellID worlwide, with their locations
Project will provides free access to tools, data to not only create this database, but also retreive location informations.
A Global Location Based Information Service
“CellSpotting.com” is a global location based information service for mobile (GSM and UMTS) users.
Use CellSpotting to find information for the place you are at! and even better, you can help and give information to others about places you know! CellSpotting is a Collaborate Location Based service built by its users.
openBmap is a free and open map of wireless communicating objects (e.g. cellular antenna, Wi-Fi, Bluetooth). It provides tools to mutualize data, create and access this map.
Help us build a free database ! Open source logging applications are available for Windows Mobile and the openmoko freerunner freesmartphone.org phones.
Einst erfand Delicious die "sozialen" Lesezeichen. Zuletzt stand der Dienst aber kurz vor dem Aus. Die Youtube-Gründer wollen ihn nun zum Twitter-Konkurrenten umbauen.
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A. Popescul, L. Ungar, D. Pennock, and S. Lawrence. Proceedings of the 17th Conference on Uncertainty in Artificial Intelligence, page 437--444. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (August 2001)