I am more of web developer but I am quiet passionate about learning web design too. Often I browse here and there for some design inspirations. There are few website that I find it really inspiring to get some design ideas and keeping up to date with web design trends.
Bootstrap Expo
I am a big fan of Bootstrap Expo. This website showcases the selected website built within one of the most popular responsive framework Twitter Bootstrap.
If you are using Bootstrap as your front end development framework this website is worth checking to see how extensible it can be. You can see some of the examples listed in the website had got best out the framework.
From Up North
If you are looking for high quality design inspirations from up north is your go. This website has a collection varying from advertising, digital art, graphic design, illustrations and everything you can think of Graphic Design.
And yes this website do showcase some of the best web design concepts you can find in the web.
Abduzeedo
Another website that does all the heavy lifting so that you can have a look at web design and graphic design inspirations at same place.
Website have a collections of design materials ranging from apps, architectures, textures types and many more.
Not to miss out on the web design inspirations.
These are my personal favourites. As I prefer simple web design based on flat design principles with focus primarily on better user experiences and faster loading speed.
Siteinspire
Siteinspire is another website that showcase website design and interactive design. At the point of writing the website have more than 4500 website listed on the website.
Media Queries
If you looking for responsive website design inspiration, mediaqueri.es have a collection of selected website design showcase.