I enjoy looking at web design galleries on a daily basis. Looking at other people's work helps me learn what I can do better, what they can do better and what people currently find popular.
The Best CSS & Flash Websites from Ireland, Northern Ireland, Dublin & Belfast
They have contests where you can win real money. They also validate your page before submission.
Not sure what language this site is in. Chrome won't translate it for some reason. I don't see the submit link.
If your looking for a specific style of site, this is a good gallery. They let you filter the gallery with many options. I can't find the submit page.