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

Parallax Effect

Snake animation on Nokia. NOKIA 3310 Mockup from: https://www.sketchappsources.com/free-source/3267-nokia-3310-mockup-vector-sketch-freebie-resource.html

A luxury villas booking app.

Using variables to change the opacity of items Design Downloaded from: https://www.sketchappsources.com/free-source/2567-chandelier-lighting-illustration-sketch-freebie-resource.html

Setting up a calendar event using Proto.io Templates and Variables

Autoscroll carousel example