After a thorough research Internet I found the following softwares to be actually working for Password Recovery :-
MessenPass :Recovers the passwords of most popular Instant Messenger programs: MSN Messenger, Windows Messenger, Yahoo Messenger, ICQ Lite 4.x/2003, AOL Instant Messenger provided with Netscape 7, Trillian, Miranda, and GAIM.
Mail PassView : Recovers the passwords of the following email programs: Outlook Express, Microsoft Outlook 2000 (POP3 and SMTP Accounts only), Microsoft Outlook 2002/2003 (POP3, IMAP, HTTP and SMTP Accounts), Incredible Mail, Eudora, Netscape Mail, Mozilla Thunderbird, Group Mail Free. Mail Pass View can also recover the passwords of Web-based email accounts (Hot Mail, Yahoo!, Gmail), if you use the associated programs of these accounts.
IE PassView : IE PassView is a small utility that reveals the passwords stored by Internet Explorer browser. It supports the new Internet Explorer 7.0, as well as older versions of Internet explorer, v4.0 – v6.0.
Protected Storage PassView : Recovers all passwords stored inside the Protected Storage, including the Auto Complete passwords of Internet Explorer, passwords of Password-protected sites, MSN Explorer Passwords, and more.
Password Fox : Password Fox is a small password recovery tool that allows you to view the user names and passwords stored by Mozilla Firefox Web browser. By default, Password Fox displays the passwords stored in your current profile, but you can easily select to watch the passwords of any other Firefox profile. For each password entry, the following information is displayed: Record Index, Web Site, User Name, Password, User Name Field, Password Field, and the Signors File Name.
