This page demonstrates the use of UberMenu and the Responsive Select Menu. Resize the page to see the responsive select menu at mobile sizes. You’ll want to disable UberMenu’s “Responsive Toggle” setting in the Control Panel to use the two together.
Currently, UberMenu 2 is available for purchase - see the UberMenu 2 Demo.
UberMenu 3 will be a free upgrade for all UberMenu 2 customers - and existing customers currently get early access to version 3 in the Support Forum