A friend told me about glance.net the other day. It's a site where you can share your desktop with someone else, which is pretty cool if you need a tutorial or some help like that.  I personally prefer to use gotmypc, which allows you to do the same thing AND to access your computer remotely (like when you are vacation.)

Another good one is this keyword density tool. What's great is that you can check articles and press releases, etc, because unlike most that require you to check URLs (meaning the site would already have to be published), this one allows you to just past int your test and checks it against 3 keywords you want to reference it against.