Short and sweet:

In Niko­la my stat­ic site/blog gen­er­a­tor, the Tag pages used to just be a big list of ti­tles link­ing to the posts in the tag. Now they can (op­tion­al­ly) look just like the blog does, but fil­tered. Check it out.

Mi­nor tweaks still need­ed (like, men­tion­ing the tag some­where in the ti­tle), but the ba­sic func­tion­al­i­ty (fil­ter­ing, pag­i­na­tion, lay­out, etc) is com­plete.

To enable it in your site, just use master from git and enable TAG_PAGES_ARE_INDEXES = True in your conf.py.