Unlimited Elements for Elementor is having a 50% off sale to celebrate Halloween. This is the addon pack that includes a Widget Creator. The sale runs from October 28th to November 1st.
Unlimited Addons added a new Retina Image widget. It allows you to set two copies of an image, a regular version and a x2 version. The higher resolution image is automatically shown on hi-def screens. If you are creating your own header template then you can use the Retina Image widget for the site logo.