del.icio.us
Have I mentioned how great del.icio.us is? No? Well, it's great.

What is it? I'll let them explain.

» del.icio.us is a social bookmarks manager. It allows you to easily add web pages you like to your personal collection of links, to categorize those sites with keywords, and to share your collection not only among your own browsers and machines, but also with others.

» Once you've registered for the service, you add a simple bookmarklet to your browser. When you find a web page you'd like to add to your list, you simply select the del.icio.us bookmarklet, and you'll be asked for information about the page. You can add descriptive terms to group similar links together and add notes for yourself or for others.

» You can access your list of links from any web browser. Your links are shown to you with those you've added most recently at the top. In addition to viewing by date, you can also view all links with a specific keywords (you define your own keywords as you add the links), or search your links for keywords.

» What makes del.icio.us a social system is its ability to let you see the links that others have collected, as well as showing you who else has bookmarked a specific site. You can also view the links collected by others, and subscribe to the links of people whose lists you find interesting.

I
Here's my del.icio.us bookmarks. So far I use it primarily while doing late night research at home on one of my many computers (which are OS X, Linux, and WinXP), so I can later access the good stuff I find when I'm at work on one of my company's many computers (almost entirely Windows).