letter-count
This is a calculator which counts the number of letters/ characters/ lines/ words/ numbers or wordsigns in a text, useful for your tweets on Twitter, as well as a multitude of other applications.
string-length
Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes
occurences
Calculate the number of occurrences of each word in a text. Words smaller than two letters will be ignored.
ccount
Count how often a character (or substring) is used in a string