This is an Android app to display data from Visible Energy smart outlets. VisibleEnergy has an iOS app, and I wanted similar functions on Android. Their web portal has never been reliable or functional for me, so let's DIY.
Free and open source, Apache 2 license.
Project started 9/3/2013, app can poll wattage data from the device and display current/max/difference plus a progress bar indicator. Hardwired IP, not ready to test elsewhere.
I've got and am testing with the Monostrip ($49, a good deal IMHO) but the UFO Power Center should work too.
The HTTP API is well documented here. JSON, HTTP, REST, pretty simple.
Add preferences, 2D charts, ZeroConf discovery, publish to Google Play.