Spark is an instant messenger application that enables you to hold conversations with people in remote computers and also you will be able to share files with other users. It keeps you privacy protected by encrypting your conversations, profile information etc. It can hold as many conversations as your want and all you need to do is to create a user account and set a password to access the program. It can reunite your co workers in virtual meeting rooms, take screen shoots of the conversational windows or check your grammar. It comes with a feature that will make yours or other user's window to buzz when you want to gain their attention.