This extension adds a twig function to help with the blur-up technique for loading images. It also includes a short script to trigger the loading and fade out the blurring once the image is loaded. See here for more info: https://css-tricks.com/the-blur-up-technique-for-loading-background-images/
Not maintained, will not be updated. If you feel like taking it over, open an issue and I'll transfer the repo. A plugin to integrate foxycart with bolt. See http://www.foxycart.com/ and the github readme for more info.