Static site generator for my photography gallery, photography.ishani.org
Vanity accepts an arbitrarily-deep folder hierarchy of images, per-gallery JSON configuration metadata and produces high-quality thumbnails and a set of lean, minified HTML files using T4 templating.
The theme uses Bootstrap 4 and PhotoSwipe to provide a pretty, modern, reactive interface with a focus on the photographs rather than adding too much other cruft.
Vanity uses jpegoptim64.exe to strip and pack resulting JPEGs. It doesn't change any of the input images.
While it has some optimisation and caching built in, there's likely a bunch of quirks and bugs in there; I've never really expected others to try and use it for their own work, even though it probably wouldn't be hard to re-theme (3 .tt files)