StumbleUpon

StumbleUpon is a system and community for web surfers, based on the concept of mutual recommendation. I use it regularly to find good sites, and I like it a lot. StumbleUpon works by adding an extension to your browser, and is therefore cross-platform and easy to use. Judging from the icons on the home page, it appears that most modern operating systems are supported. If not, get Firefox. It's quite worth it.

I stumbled upon StumbleUpon when someone added my blog to the list. It really helps open your eyes to a lot of things.

My StumbleUpon page (this works as a mini-blog as well).