Two years ago I made a "Home portal" application which is running on a Raspberry Pi 2 with Raspberry Touch 7" LCD. It can show the weather, events from Google Calendar, traffic map on Google Maps, task lists, slideshow from Picasa & Flickr, RSS news & play internet radio...etc.
Tech stack: NodeJS, Coffeescript, React, TweenMax (animations). Running in Chromium on Raspbian OS.