Free Online Broken Link Checker: Site Wide no more 1 by 1 pages
If you have your own web site this is a handy service to validate all your links.
Check Email: Free Email Address Search – Ip Address Search
Here’s a useful free email address validation service I used a couple times today.
Speedtest.net – The Global Broadband Speed Test
Speedtest.net measures the performance of your broadband connection. At the end of each test, you are presented with the download (the speed of data from the server to your computer) and upload (the speed of sending data from your computer to the server) bandwidth speeds. The tests are performed completely within your web browser over HTTP (just like normal web browsing)
I have been running this online service once a week for over a month and am very pleased with the results.
Shields UP!! — Internet Vulnerability Profiling
Test your firewall.