You might have used search engines that present your results visually (like KartOO) or organizes them into clusters (like Clusty), but here’s an innovative approach that combines these two features: KoolTorch.
Can you imagine paging through 100 Google results? (yawn), but what if you could see 100 results on one screen, clustered by subcategory, and then quickly hover over each numbered result to see a page preview? Here’s what it looks like to view 100 results for the search query: renaissance art medici (hovering over result #10 in the Arts subcategory). I’m not sold on the quality of the search results yet, but I like the innovative presentation!