Windows Phone 7's app lineup (photos)

Among the third-party titles for Windows Phone 7 is a program from Motolingo that monitors drivers speed and lets them know if they are accelerating too fast. Those that drive safely can score points, while those speeding get dinged.

Motolingo is among the startups that attended a weeklong training Microsoft held in Mountain View for mobile developers to build their Windows Phone 7 applications.

Motolingo's app can also alert drivers to traffic issues, as seen in the example here.

Clever Sense, a 10-person startup has built an application called Seymour that acts as a virtual concierge, helping to connect users to nearby resources.

In this case, Seymour offers to find any of a variety of types of nearby cuisine.

Soundtrckr CEO Daniele Cabrese describes his application as kind of Pandora meets foursquare and Facebook. The streaming music service lets users listen to any of 8 million tracks and also keep tabs on what friends and those nearby are listening to.

Among the other features of Twitter's Windows Phone 7 application is the ability to dive into the details of a tweet, something the company plans to call "tweetails."

One of the features, unique to the Windows Phone 7 version of Twitter, is the ability to explore the service deeply without having an account of one's one, something previously only available on the Web.

Twitter's app takes advantage of the phone's GPS chip to identify nearby Tweets.

Sean Cook is Twitter's mobile expert, typically using 10 or more phones at any one time. Cook praised Windows Phone 7 for its unique design and for an aesthetic that lends itself to long lists of data, such as scrolling tweets.