Google command line tool: http://google-opensource.blogspot.com/2010/06/introducing-google-command-line-tool.html
I'm of the opinion that Google Maps and Street View is one of the most powerful free tools on the web. I use the Maps several times a week for personal use and have used Street View a huge amount at work. Trying to find good spots to install monitoring equipment and find safe spots to do spot sampling it has been an enormous help.
Decided to try out Google Public DNS after having trouble with OpenDNS failing to resolve UKB when I know damn well its up and running.
Just to clarify, though we've opened up sign-ups, Google Voice is still limited to everyone in the U.S. for now.