I found very cool website where you can browse various table designs and apply to your Tables, Repeaters, GridViews, ListViews or any other tabular data. The designs are pure CSS code and it is extremely easy to apply to your tables. If you are not familiar with CSS or you just hate to do design work, this might be a good solution to you.
Image below shows some examples I found there.
If you are interested, you can submit your own template here. If you are not sure how to do that, check out these tutorials.
Happy browsing!