Utilities

Free Online PDF Unlocking Utility
Sometimes PDF files prevent the user from printing or copying and pasting their contents. This free online utility removes these restrictions from a PDF file.

Excel Spreadsheet Unlocking Utility
Sometimes Excel spreadsheets contain locked sheets that cannot be updated without entering a password. This free online utility removes the password protection from any Excel spreadsheet.

Implementing NSLookup In Java
NSLookup is a command line utility that, given an IP address, returns the corresponding host name and vice versa. This article explains how to write an NSLookup clone in Java.

Hostname/IP Address Resolution Utility
This utility that resolves an IP address from a given hostname (and vice versa).