Custom Looker Application

[hwimoon]

Hi,

I just wanted to see if anybody has done something as building a custom application within Looker, similar to the applications that are available in Looker Marketplace (e.g., Digital Marketing Analytics). 

My goal is to create an application (or Dashboard) that has a similar layout so I can customize nice features like the navigation box as shown below. 

Any suggestions would be highly appreciated! ​