Maps |
Mr Crow's Coordinate Checker |
Convert OS <> Lat/Long. Show on OS,
Google, Open StreetMap. |
CACH'EYE |
CACH'EYE is a free personalised map service for
geocachers. |
OS getamap |
Create your own on-line OS map. |
OS Gazetteer for place names |
Use place name search in OS getamap. |
Google Maps |
Zoomable maps focused on an address
or post code |
Google Earth Download |
Google Earth lets you fly anywhere on Earth to
view satellite imagery, maps, terrain, 3D buildings. |
Open Street Map |
OpenStreetMap is a free worldwide
map, created by people like you. |
OS National Grid |
A BEGINNERS GUIDE TO GRID REFERENCES |
|
|
Anagrams
|
Internet Anagram Server |
The Best anagram solver from
Wordsmith |
|
|
Codes & Ciphers |
Rumkin Cipher Tools |
Definitive resource for encryption techniques. |
Decode Telephone Pulses |
Detect DTMF tones in audio files. |
Huffman Coding |
Generate an optimal Huffman Tree. |
Huffman Coding
Theory |
In computer science and information
theory, Huffman coding is an entropy encoding
algorithm used for lossless data compression. |
Codes, Ciphers, Encryption and Cryptography |
Cryptography is the discipline of
using codes and ciphers to encrypt a message and
make it unreadable unless the recipient knows the
secret to decrypt it. |
Morse Code
Theory |
Morse code is a method of
transmitting text information as a series of on-off
tones, lights, or clicks that can be directly
understood by a skilled listener or observer without
special equipment. |
Morse Code Decoder/Encoder |
Rumkin's decoder/encoder. |
Pigpen
Cipher |
The pigpen cipher (sometimes
referred to as the masonic cipher, Freemason's
cipher, Rosicrucian cipher, or Tic-tac-toe cipher)
is a geometric simple substitution cipher which
exchanges letters for symbols which are fragments of
a grid. |
|
|
Number Stuff |
Number
Gossip |
Properties of Numbers. |
Roman Numerals |
I, V X, L, C D and M. |
Numbers in Different Languages |
Un, deux, trois ... Eins, zwei, drei
... |
Number Base Converter |
Decimal to Binary to Octal etc. |
List of Prime
Numbers |
The first 10,000 Prime Numbers. |
Digits of pi |
Search 2,000,000,000 decimal digits
of pi. |
Generate Digits of pi |
Generate your required digits of pi. |
Golden Ratio
(Phi) Digits |
Search 2,000,000,000 decimal digits
of Phi. |
Check Digit |
A check digit is a form of
redundancy check used for error detection, the
decimal equivalent of a binary parity bit. |
|
|
Possible Numbering Systems |
Periodic Table |
The periodic table is a tabular display of the
chemical elements, organized on the basis of their
atomic numbers, electron configurations, and
recurring chemical properties. |
ASCII Codes |
ASCII codes represent text in
computers, communications equipment, and other
devices that use text. |
Unicode Characters |
List of Unicode Characters |
Telephone Keypad |
A telephone keypad is a keypad that
appears on a "Touch Tone" telephone. |
Dartboard Scoring |
180! |
Car Country Codes |
List of international vehicle
registration codes. |
International Dialling Codes |
List of International Dialling
Codes. |
UK Dialling Codes |
List of dialling codes in the United
Kingdom. |
Tenpin Bowling Scoring |
X5/XXX81 etc. |
Suduko |
Solve Suduko Puzzles |
|
|
Maths |
Solving Equations 1 |
Systems Solver. up to 5 equations, 5
unknowns. |
The Number Empire |
Comprehensive set of Maths Tools. |
Calculate Big Numbers |
Big Number Scientific Calculator. |
Right Angled Triangles |
SOHCAHTOA |
Circle Equations |
Round and Round. |
|
|
Graphics |
Animated GIF Disassember |
Break GIFs into frames and duration. |
Make Q
Codes |
A pretty Q Code generator |
Picture Finder |
TinEye Reverse Image Search |
Pixlr Online Picture Editor |
The most popular online photo editor in the
world! |
iPiccy Online Image Editor |
Edit pictures, apply photo effects, add text and
even paint! |
|
|
Colours |
Colour Names |
List of colours by name showing hex, RGB values,
and hue, saturation and brightness.. |
Pantone Colours |
Convert Pantone Colours to RGB. |
RGB Colour Model |
The RGB colour model is an additive colour model
in which red, green, and blue light are added
together in various ways to reproduce a broad array
of colours. The name of the model comes from the
initials of the three additive primary colours, red,
green, and blue. |
|
|
Setting Puzzle Caches |
GBA Puzzle (Mystery) Cache FAQ |
Tips on setting Puzzle Caches. |
|
|
Pages Devoted to Puzzle Cache Solving |
parmstro's geocaching pages |
Some hints on solving puzzle caches. |
Puzzle Solving 101 Series |
The caches in this series will give
you the skills to get out there and solve your local
puzzle caches. |
Tip for solving puzzle caches |
What it says on the label. |
Solving Puzzles Caches |
I'd rather be caching. |
How Do I Solve All These &#$@! Puzzle Caches? |
A looooooong puzzle cache. |
Puzzle Solving FUNdamentals |
A PDF full of puzzle stuff. |
|
|