Google Latitude

The Google Latitude API allows for websites and developers to integrate with Google Latitude, which lets users update and read their current location, their location history, and other geo-related information. In Latitude, a location is a record of where a user was at a given time. A location always contains a latitude, a longitude and a timestamp. It might also contain more details about the position of the user at that time, such as altitude, or metadata about how the position itself was captured, such as accuracy. A user typically has a current location, which represents the most recent known position of the user. In some cases, however, a user might decide to temporarily hide, making their position invisible to Latitude friends. A hidden user has no current location. A user can opt to have their locations stored as a time series by Google. This collection of positions is called the user's location history.
Google Latitude

NileGuide

NileGuide is a resource to research and plan your next trip. On NileGuide, travelers can discover what they’re looking for on their vacation from small hotels in Seattle or hole-in-the-wall pubs in Prague. The service can connect travelers to relevant suggestions that make for more rewarding travel experiences. NileGuide API makes most of their original travel content available to partner websites.
NileGuide

MotorsportReg.com

MotorsportReg.com is a membership management and event registration service for motorsport driving and social events organized by motorsport clubs, racetracks and sanctioning bodies in North America. We make it easier and more fun for organizers to manage events by automating tasks, improving accuracy and saving time. Events include autocross, driving schools, HPDE, club races, test days and rallies organized by groups like the SCCA, BMW CCA, PCA, Audi Club, Miller Motorsports Park and Circuit of the Americas.
MotorsportReg.com

Open Context

Open Context is a free, open access resource for the electronic publication of primary field research from archaeology, museum collections, and other field science datasets. Open Context provides a simple RESTful web service to get content expressed in XHTML (for human use in browsers), the supported Atom Syndication Format (plus GeoRSS extensions), JSON (Javascript Object Notation), and KML (the format used by GoogleEarth). The Atom-based web services provide a set of query options to request items from a collection.
Open Context

Google Buzz

Google Buzz is a new way to share updates, photos, videos and more, and start conversations about the things you find interesting. The core platform extends from Google Gmail. The Buzz API provides a wide variety of open standards for developers including: Atom, AtomPub, Activity Streams, PubSubHubbub, OAuth, MediaRSS, Salmon, the Social Graph API, PortableContacts, and WebFinger.
Google Buzz

SweetSpot

SweetSpot is an online daibetes management program. SweetSpot allows users to upload blood sugar readings from their meter, email, or a cell phone. Once blood sugars are uploaded, the information is accessible over the internet. The RESTful API allows users to pull information from SweetSpot directly into an excel spreadsheet, or view recent blood suger highs and lows with a news reader. Default response formats are XML, JSON, RSS and Atom.
SweetSpot

World Government Data

The Guardian�s new World Government Data site enables users to search through the government data of the UK, US, Australia and New Zealand in one place, rate the quality of the data, see how countries compare and submit their own visualisations of what they uncover.
World Government Data

Pachube

Pachube enables you to store, share and discover real-time sensor, energy and environment data from buildings or other devices. Pachube provides most of its functionality through its API, rather than through its web site. Plug-in to participating projects in real time so that, for example, buildings, interactive environments, networked energy meters, virtual worlds and mobile sensor devices can all talk to each other. Real-time data available. Pachube makes use of Extended Environments Markup Language (EEML), which extends the construction industry protocol IFC.
Pachube

Open Government Data Initiative

The Open Government Data Initiative (OGDI) is an effort led by Microsoft's Public Sector Developer Evangelism team. OGDI uses the Azure Services Platform for publishing and using a variety of data from public government agencies. OGDI is also a free, open source starter kit.
Open Government Data Initiative