Here are some sample apps for nw.js, some of them are modified from GoogleChrome/chrome-app-samples.
Please visit nw.js group for discussions.
https://github.com/nwjs/nw.js/wiki/How-to-run-apps
Easy way
npm install -g nw
git clone https://github.com/zcbenz/nw-sample-apps.git
cd nw-sample-apps/file-explorer
npm start # or "nw ."