Why it's the best: Tells you if flight prices are going up or down.
It sucks to keep checking flight prices, only to find out that you could have paid a lot less if you pulled the trigger a week ago. Farecast helps you know "When To Buy^TM, When To Fly^TM, and Where To Stay^TM" using their technology and data. You can see how Farecast works here.

Product Reviews

Why it's the best: Trustworthy product reviews in every category, not just electronics. Over 2.1 million product reviews on the site.

On Buzzillions.com, the majority of reviews are written by Verified Buyers - people who have been verified through the retailer to have actually purchased the product. You can also instantly see what the crowd thinks of a product based on the review summary of star rating, pros, cons, and the best uses.

They're trustworthy because they don't scrape the web for reviews - they directly collect thousands of reviews a day directly from people who purchased products from online retailers like Staples.com, REI.com, Walgreens.com.

Cheap Gas Finder

Why it's the best: Find out where the cheapest gas is (in real time) within your zip code.
Yes, gas prices are high. At least with GasBuddy, you can find the best deal in town. They basically get real time price updates from volunteers (and they're always looking for more).

Electronics Recommendations

Why it's the best: They make it really easy to find community recommended electronics best suited for your needs.

Retrevo offers two very easy to consume recommendations - a Value recommendation and Community sentiment recommendation. Basically, they make it extremely easy for you to know if the product is good for the price you're paying, and whether the community opinion on the product is positive or not.

Movie Reviews

Why it's the best: 10 years of saving people from bad movies.
Rotten Tomatoes and their famous "Tomatometer" measures the percentage of positive reviews from ‘Approved Tomatometer Critics' to give you the bottom line about a movie.

Local Service and Restaurant Reviews

Why it's the best: Find out the good and bad for all your local needs.

Ever been caught with an expensive dinner with crappy food, a mechanic that over charges, or a really bad haircut? Yelp is THE site to see what others are saying and how they're rating local services - everything from salons to dentists and doctors to restaurants and shopping. It's also a great way to find great hole-in-the-wall food places you never would have known about otherwise.

Music Recommendations

Why it's the best: "Last.fm connects you with your favorite music, and uses your unique taste to find new music, people, and concerts you'll like."

You can get a personalized radio station that will play songs you, based on what you previously liked. They also aggregate all the data from every single song people listen to, to show top weekly artists, what the entire Last.fm community is generally listening to, and connect you with people with similar music taste.

Leave a comment if know of a review or recommendation site that's worthy of this list.

Stop worrying about what to get that person who already has everything, because unless the person that you know is a closet serial killer, then they probably don't have one of these. At “Corpses For Sale” you can purchase an incredibly realistic full body corpse with rotting flesh, teeth and yellow fingernails. The corpses are not real, but the expert craftsman sure makes one stop and take a double take and the reason, is because they look so real.

Looking for a bit of nerd humor with a tad of geekiness? This website offers an assortment of actual technical signs that are not normally funny, but these signs come complete with humorous captions that makes them funny to look at and to think about.

The website introduces an amazing illusion that will have you seeing dots for the rest of the day. Watch a rotating board containing three yellow dots and one green dot, that are there in front of your eyes one second and gone the next second. This is a really cool optical illusion that will capture your attention for the next few minutes.

Built to pay tribute to one of the world's most relied on consumer products “Toilet Paper”. This website presents an extensive collection of brands of toilet paper that range from the mundane to the exceedingly rare. This is a comprehensive Internet resource for learning about toilet paper.

Now, for a fun and dizzying activity that will freak out your mind and confuse your senses. Some sensitive observers may become dizzy and/or sick, so if you are one of these people, then you should leave the site immediately.

Angry Alien has created a new twist on the typical movie review. In 30-seconds, visitors can watch a troupe of bunnies re-enact some of the best movies of all-time in a movie parody sort of way. Some of these movies parody are absolutely hilarious and a must to watch. My personal favorites are: Borat, Jaws, The Grudge and Star Wars.

Sure, Dr Mega Volt is a tad bit weird and completely out of his mind. Anyone who would knowingly put himself in an electrifying situation has to be included in an article entrenched in the world of weird. This guy has either a death wish or he has found a job that pays really, really well.

The Department of Homeland Security introduced in 2002, the Homeland Security Advisory System that features a color-coded warning bar scale that ranges from green (Low-risk) to red (Severe-risk). Now, you can get you very own to download onto your computer for free. I don't know why anyone would want one of these, but there are some weird things that people want for some strange reason.

If you have wondered how many pennies would it take to fill-up a room, then this website will answer this question and continues to take this question even further. What would one billion pennies look like if stacked?

Developed in 1994, “The Really Big Button That Doesn't Do Anything” is a usual artifact that attracts thousands of people every day. Pushing the button is pointless, but for some reason people still continue to push the button regardless.