@Hanko The SeyDesign Masonry stack was updated and moved here about a fortnight ago:
Of note, it is the first stack with support for the new ‘level 3’ CSS grid specification. This offers a native way to create a masonry grid. Currently only supported in Firefox nightly, but expect other web browsers to add it soon.
The ProGallery stack also does masonry layouts, with a choice of 10 lightbox configurations: