Like.com...

Is like, my new best friend, especially as I am searching for shoes.
Wayyy cooler than ShoesByColor.com or Zappos.com--Like.com is a "visual search" that let's you choose a shoe and then produces dozens of matches to that shoe, from hundreds of web stores, based on style, color etc.! It can also search bags by shape...shirts by pattern... shoes by color or material...
For example:
Here is a visual search:

This has been incredibly useful, because you can search for the perfect shoe and draw results from all over the web--not. just. ZAPPOS.
Plus, I have just come to my senses that online shoe store dominatrix Zappos.com POWERS 'ShoesbyColor'--so it only produces shoes from Zappos!!

Like.com, on the other hand, pulls from lots of different sources.

From Like.com website:
We believe that there are literally millions of items that are difficult to describe via text-based search and where individual tastes are all over the map -- think of your favorite pair of earrings or shoes and what an ordeal it can be to find something new but in a similar style.

We created Like.com to solve the challenge of finding "the perfect you" for a broad range of aesthetic and soft goods.

Like.com utilizes our Likeness Technology" to create a digital signature that describes the photo's contents and enables a more accurate search for similar looking items and products.
Our initial launch focuses on handbags, jewelry, shoes, and watches - allowing users to search and purchase items from thousands of leading and boutique brands. We will very quickly add clothing and a number of other aesthetically oriented product categories.

Key features of Like.com include:

Likeness Search" - the ability to search by image instead of text;
Like Detail" - finds items that have a specific feature you like (such as a buckle, straps, bezel, etc);
Like Color" - find color variants of the item you desire;
Like Celebrity" - find clothing, shoes and accessories similar to those worn by your favorite celebrities;
Like Upload" - the ability to upload your own photo of your favorite item and find the same or similar products, coming soon.