Windows Phone 7 launched recently has its own market place which is connected to Zune Software for downloads. The market place is not available for browsing using a web browser, but Mylostblog has found a way to access it easily from the web browser. The blog has created an URL from where you can access all the market place apps, but the only downside is that it is in Italian. You can access it here.
You can have a look at all the apps available and also get the download link for it using the Zune software.