Google spoofs and Google hacks are a fun and can often be used as a way of looking at and analyze the results from the world's most popular search engine; some also provide you with a quicker way of finding just what you are looking for as well as comparing results for different sites. Considering the amount of knowledge and effort it takes to get decent rankings on Google, anything that can save us some time is worth looking at.
FreshGoo makes it easy to search Google for pages added recently (today, yesterday, last 7 days, past 30 days). It's a great way to keep track of where your site is at and identify any possible indexing problems.
Compare the number of results for two competing keywords or phrases.
Great tool to quickly find out where you are in the Google index for a particular keyword. Just enter in your URL along with the keyword or search phrase and let the Google hack do its job. You can search up to the top 1000.
It's Google, but totally backwards. Once you enter your search query, you'll see all result backwards as well.
Google Touch Graph
With this tool you can browse a recursive graph of back-links to a given URL. Once you've entered the URL, a graph will pop up showing you every site that is currently linking to the specified location. You also have the ability to manipulate the graph.
Google Dance Tool
This tool lets you compare your rankings on the different servers and is especially handy if you'd like to get a preview of where your site will end up in the new index once the Google Dance is done. Too late to make any changes, but it's nice to know as to what to expect.
One of the newer Google spoofs on the block. Soople offers several different interfaces that take advantage of the Google search engine. There you can search by filetypes specified by radio-button, do stock searches or image searches, and search for definitions. Use the links at the top of the page to find more in-depth search forms for calculators, a translator, phone number search, and a "superfilter" that looks a lot like the advanced search form.