Photo Slideshow for ChromecastVery easy implementation, but I don't think anyone has done this so far.
1. Sign-in on Chrome sender.
2. Connect to receiver.
3. Select album from your own Picasa/Google+ albums.
4. Photos are fetched on the Receiver side and displayed as a slideshow.
Source-code to be released soon.
Planned improvements: "Remote" controls for the slideshow, starting, stopping, changing speed, manually switching between photos.
This would be even nicer with an Android/iOS Sender, but my Android dev skills are a little bit rusty, so maybe someone else wants to work on the Sender side once I released my code. Receiver side should be able to work with either sender as long as it receives the correct messages.
Edit: Source code now online:
https://github.com/Scarygami/chromecast_experiments