Here are some cool tools, I tried this week. I went searching for some and others came to me through friends and Google alerts.
A way to synchronize your Firefox bookmarks on a server. Was very useful to me when I moved to a new laptop last week. Works pretty well for the simple things I tried.
Even though I mentioned this earlier, Google seems to have made some UI changes which is tremendous improvement. This is one of the tools I use more and more.
Fleck is a service to annotate web pages and share it with your friends. I tried the Firefox extension and it works well. Here is a Fleck on my previous blog entry.