Reddit is another social bookmarking site, similiar to Digg in structure, that allows webmasters to promote their site.

How Reddit works:

If you see a webpage you like, you bookmark it or submit it for others to see. The Reddit site has a search engine that allows you to find popular submitted links. People can vote it up or down. If it’s voted down to a negative, it dissapears from the search engine.

Reddit compared to Digg:

I have to admit I’m not a big fan of Reddit. It doesn’t give anywhere near as much traffic as Digg does. Based on my experience, it is also much harder to stay in their engine compared to Digg, without getting your link voted down quickly. Most of the social networking plugins for WordPress blogs, include a small reddit submission icon.