Sort - Sorts lines
Remove All Empty Lines - Self explanatory
Compare - Compares lines of first textbox to lines of second textbox and result are shown in third textbox. It doesn't matter have you compared first textbox to second textbox or vice-versa, it's associative.
Add Zeros - Adds zeroes to array (Intended to work with numbers only)
Remove Zeros - Removes zeros (WARNING: works only with numbers)