There are several Anti- virus manufacturers that are providing some of their products for free as means of promoting their paid versions. BitDefender joins them by launching three free versions of their products as a means to make themselves better known.
BitDefender Free Edition
This is a virus scanner that runs on demand. That means it does not offer real-time protection against viruses , so you have to do manual scan.
BitDefender Anti-Phishing Free Edition
This is an add-on for Internet Explorer and Firefox which makes browsing more secure against phishing attempts by blocking the malicious web pages that steal data and other critical personal information.
BitDefender Chat Encryption
Enables secure communications to users of Yahoo Messenger or Windows Live Messenger by encrypting the messages or conversations that we go through these instant messaging programs. The encryption process is completely automatic and transparent to the user.
Personally, I think the free virus scanner should provide real-time protection, as many of the present free Anti virus editions are providing real time protection,but the other two applications can be very helpful to protect our data and our conversations.