in any niche then there is lot of categories to be introduce but in case for good design there is an example i can tell you that is paytm. a very good website with fantastic cool design and simple to understand.
The best web designs follow the Web 2.0 standard completely. What I mean is they are easy to navigate, have a pleasant flow, and are coded well with without errors. A lot of websites are utilizing WYSIWYG editors with templates to create that flow. Editors such as Joomla and Wordpress offer the best templates to create a beautiful site.
