The Lone Gunmen remain the only source of information that hasn't been killed off. Langly, Byers, and Frohike are the three editors of The Lone Gunman Magazine. The Lone Gunmen are a crucial part in the X-Files, especially when it comes to solving tricky cases. As of most informants, Scully doesn't have a full trust in them, but Mulder believes every word they say. Their expertise is in communications, and technical support, along with providing information on suspects. Cancerman knows of their existence and has showed us that he could easily kill them off.
