What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Live Mail, Mozilla Thunderbird and Outlook Express

In the entirely busy life of today where a person has no time for others and the speed of life is increasing day by day and making man to forget the relations which are dear to him. A man doesn’t see faces of his children because of his tense schedule and day night meeting and also misses important family functions.