With the latest release of ArcGIS Online and just in time for the UC, the Styler template got a major update. Styler is a newconfigurable app template that you can use to create and share 2D or 3D web map apps on-the-fly. What makes it different from other templates is that you don't need a web map or web scene to get started, and you can completely configure an application with URL parameters on-the-fly in your web browser.
To get started, all you need to do is zoom to a location, change a parameter or two, and send the URL to a friend.
One of the biggest enhancements to Styler was the addition of the Share panel. With the Share panel, you can style an entire map in your web browser just by adding, removing, and changing URL parameters in the window. Once you are finished, you can apply the changes and then share the URL with your friends.
You can configure everything from the title, colors, layout, to the position of widgets on the map and much more. See a list of all of the configurable parameters here.