Here are some links for various riddle tools.
Purple Hell: A one-stop-shop to a host of riddle tools and alphabets
Morse converter Text to morse and morse to text converter
Rumkin Riddle Tools Lots of ciphers and codes here....an alternative to Purple Hell
Paul's Chou: Binary/Hex/Base64/ASCII and text decoder
Dancing Men: The famous Serlock Holmes Cipher is shown here.
Map Tools: This can be useful to find the distance between cities....used by some riddle makers.
Free online BarCode Reader: Reads barcodes and QR codes without a download.
EXIF Viewer: To see hidden information in images, just read the text under your image.
Tineye: This is a reverse image finder....a google for pictures if you wish....
DNA decoder This is a rarely used 'cipher'.
Universal anagram solver: Does what it says on the tin....
Phonespell: phonespell is used to find words hidden in telephone numbers.
Flags: See a flag? It may have many meanings...find them here.
Download these useful tools.
GIMP: This is a powerful image manipulation tool, it can remove layers and change threshold in images among 100's of other effects.
Audacity: This is a sound editor,record sound without downloading the wav files, lots of effects such as reverse play, slow down, speed up..