I am running Linux Mint Debian Edition (LMDE) and I need a program like Microsoft Publisher that I can make fliers and pamphlets with. Is there a program like that available? Is it free?
Scribus is an open-source desktop publishing program and the closest analogue to Publisher. It supports importing Publisher files in the development branch (that is, the next major release).
LibreOffice Draw is also comparable. Its focus is as more of a vector graphics editor than a DTP tool, but it does have many DTP features too. It also supports Publisher import.
Both of these are in the LMDE repositories. Both of them are free.