Japplis Toolbox is a compilation of text utilities in one application.
It can encode and decode URL, Base64, Hex, ROT13, ROT47, Java unicode.
It can convert numbers from/to binary, octal, decimal, hexadecimal and to date.
It gives you text information such as character count, word count, line count, hash code, MD5 or SHA.
You can get Java system properties, environment variables or Swing default values.
It finds regular expressions in text and in files, even gz compressed.
It can sort lines, reverse lines, shuffle lines, add number to lines, delete duplicates, prefix lines, trim spaces or extract words.
It runs on Windows, Mac OS X and Linux.
You can also run it online as applet