Lights is a little web app that allows me to decide what colour my room will be. It works as a remote to a networked Arduino or Core with RGB led strips.
Getting everything to work and colours to transition smoothly and without delay was a challenge, as I had not developed software for Arduino yet and it is a relatively resource-constrained device. Additionally, it's been a playground to try light animations, weird input methods and applying contextual information such as weather and device presence.
Together with Brendan Spijkerman, who added an ambilight feature, I'm currently working to build an improved and polished version for Particle (Spark) Core and Photon.