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You may find something of interest here if you use the Korn Shell.

Using in your script

Paste the following line in your .profile:

export FPATH=$FPATH:<Path to this directory>

In hello.ksh:

#!/bin/ksh
bye hello world

Contents

Function	Description
bye	Normal termination
capitalize	Capitalizes the given string
die	Anormal termination
dos2unix	Converts a DOS file to a UNIX one
index	Prints the position (form the beginning) of given character in given string
lock	Returns 1 if a previous instance is running, otherwise returns 0
unlock	Releases lock for others instances
log	Inserts a new entry in log file
mktmpf	Returns a new temporary file name
pad	Right pads the given string with given character
prompt	Sets a pretty prompt
push	Pushes a value into a stack
pop	Pops the first value from a stack
size	Gets the number of elements in a stack
quote	Quotes the given string
readkey	Reads a key and stores the result in given variable name
readline	Reads a line and stores the result in given variable name
rindex	Prints the position (form the end) of given character in given string
rpad	Left pads the given string with given character
rsub	Replaces the last occurence of given pattern
sub	Replaces the first occurence of given pattern
tabify	Converts spaces into tabs
unix2dos	Converts a UNIX file to a DOS one
untabify	Converts tabs into spaces