Hi I'm looking for a theme or plugin generates a nice block list from a search and generates sidebards from categories, tags, etc

A - Neat Search results.

I've been using the Decode theme and it's great, minimal and slick and the sidebar can be hidden by default, which I usually find distracting if let open. Now, I'm trying to setup an enviorment where I can post or make a page about subjects, share files and post image examples that I would wish they where queried in a way alike this site: Unlike the way it is now:

So I would like to have maybe a thumbnail. Tags/categories showing. Maybe external links to a forum. And it the post is about files that are being shared maybe have a field that allows to click and download all the files related to the post. Too much? :)

B - Generated sidebard on certain pages.

The generated sidebar could list all the elements (post or pages) of a category, tag, etc, so you can just jump between items that share some characteristic easily. So if I'm looking at a project, I can easily jump to other projects, or if I'm looking at scene file giveaway I can easily jump to other giveaways.