The Yahoo Developer Network just launched an Application Gallery. Similar to the Widgets Gallery, this site shows off the best applications built on top of the Yahoo APIs. There’s the opportunity to upload and submit your applications to the gallery and, once they are there, have them reviewed and showcased.

This comes as frosting on top of today’s announcement of a whole new set of APIs, the first out the gate being the commercial Shopping API which gives third parties a cut of any revenue generated by their sites. Jeffrey McManus who is presenting the Yahoo Developer Network here at eTech posted about the other APIs which includes support for browser-based authentication so apps can take advantage of their user’s Yahoo profile and information tied to that profile.