Regarding (c), have a look at this jekyll theme [1] for photo galleries.
Jekyll is really nice to use, but the photo galleries are pretty few and far between.
Disclaimer, I couldn't get this to deploy using Github pages (which is nice) because it uses unsupported plugins. I have it split across two branches and works nicely enough. Certainly the most responsive gallery I've found.
Edit: removed direct link to the person's pictures :)
Jekyll is really nice to use, but the photo galleries are pretty few and far between.
Disclaimer, I couldn't get this to deploy using Github pages (which is nice) because it uses unsupported plugins. I have it split across two branches and works nicely enough. Certainly the most responsive gallery I've found.
Edit: removed direct link to the person's pictures :)
[1] https://github.com/dansku/photoGallery