Is there any kind of software that can do this

I am looking to send msgs to all the people who are in the particular facebook groups, and the msg should go in there inbox and not in the spam folder in facebook. Is there any good software to do it.

I saw one software, but forgot its name.

Do you know any other good Facebook Marketing software other than only Group Poster? Do you know any such good softwares?

Comment if you know about it.