This 18 Cool Gradients was designed by Osama Dawood https://www.sketchappsources.com/free-source/3607-gradients-ui-kit-sketch-freebie-resource.html

Going to a screen depending on a picker selection using states, variables and the 'Fire an items event' action

Form validation using variables and states

Here is an example of a scrollable data table with vertical and horizontal scroll and a fixed header. Data design: https://www.sketchappsources.com/free-source/3706-datatable-with-horizontal-scroll-sketch-freebie-resource.html

2 types of modals / popup examples

Design Credits: https://www.sketchappsources.com/free-source/4675-marier-shopping-ui-kit-ebizmirli-sketch-freebie-resource.html

A Sample project used in various official Proto.io tutorial videos. It contains various design patterns commonly found in popular mobile apps.

A prototype of the admin-panel dashboard of e-shop software, built with Proto.io’s Material Design library. The prototype uses containers and states to create a highly interactive, single-page dashboard.