
CurrentMillis  How many milliseconds is it since the start of 1970? 

Spider calculator  Mmmm yum yum. 

Pi  Everyone loves pi 

Monolith  An evolutionary click game 

Octamatics  The power of eight 

Cows  Cow comparisons 

Sleep Calculator  If I go to sleep now, when should I wa... ZZzzzzz 

Progress  How much longer? 

50 Cent  After adjustment for inflation 

Number  Rules: make number go up 

Mental age  How old is your mind? 

Population Clock  How many people in the world right now? 

Your birthdate in Pi  Find your birth date in Pi 

Dumb calculator  Preprogrammed calculator 

Indeterministic watch  What time is it? 

Gridwatch  The UK's National Grid Status 

Numbers  Distinctive but mostly useless facts 

Boogie maths  Maths explained through the medium of dance 

Binary Clock  Display the time in binary (or hexadecimal, or smileys)... the ultimate geek clock site! 

Circular  How well can you draw a circle? 

People in space  How many people are in space right now? 

Two hundred  Numbers from 1200 in Google images. 

Number Gossip  Number secrets exposed..... 

One second  A lot can happen on the internet in one second 

Spurious correlations  You can prove anything with statistics. This is why you shouldn't eat cheese before bedtime. 

Mega Penny  Also check the MegaMoo link... 

Every number ever  All the numbers, listed in numerical order 

Accomplished  Things people have achieved at your age 

Emoji tracker  Find out the most popular emoji on Twitter, in realtime 

List of numbers  A list of numbers (incomplete) 

primes  Ten thousand prime numbers 

9007199254740992  Get to the 9007199254740992 tile 

2048  Addictive game, use the arrow keys to combine blocks, try to reach 2048 

Adding machine  Binary adding machine powered by marbles 

Seven down  A pointless numberbased counter dropping game. 

Cars Count  Count the cars passing by a window in Amsterdam 

Frog Fractions  Learn all about fractions! 

Tau  Tau, twice pi  the first 100,000 digits. Print and keep this handy reference, in case you ever forget a digit. 

Every Barcode  Online artwork  runs for 317 years 

US Debt Clock  Some frighteningly large amounts of money. 
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