ShareMedia is a photo manager (support for video and music is planned). Includes metadata editing, 3D viewing, automatic file ordering and sharing with your friends using the Jabber IM protocol or Picasa Web.
Picasa KML is a servlet that serves KML for images stored in Picasa albums. It is written entirely in Java, and leverages the Google photo/data APIs to dynamically query Picasa. This allows for images to be overlayed on Google Earth.