The American Institute of Physics (AIP) was founded in 1931. "It is the mission of the Institute to serve the sciences of physics and astronomy by serving the Societies, by serving individual scientists, and by serving students and the general public." It currently has ten member societies.
AIP sponsors Inside Science, a science news service of that provides news content for syndication by news organizations, delivering articles, graphics, audio and videos suitable for a general audience.
Physics Today Daily Edition is a daily news service/blog from the editors of Physics Today featuring current physics news. There is an option to limit to just "Physics Updates."
The American Physical Society (APS) was founded in 1899. APS is the world's largest physics association. It serves the international physics community with journals, meetings, and public programs. The missiton statement reads, "In the firm belief that an understanding of the nature of the physical universe will be a benefit to all humanity, the objective of the Society shall be the advancement and diffusion of the knowledge of physics." They publish Physics Review A - E, Physical Review Letters, and Reviews of Modern Physics.