American Record Guide is America's oldest classical music review magazine. Published six times per year.
CD HotList: New Releases for Libraries is usually published on the first Monday of each month. It is a monthly list of recently-released compact discs maintained by Rick Anderson, Associate Dean for Collections & Scholarly Communication in the J. Willard Marriott Library at the University of Utah.
AllMusic is a website with reviews, sound samples, interviews and other free content. Covers rock, jazz, blues, classical, and other genres.
Pitckfork is a website with reviews, interviews, special features, video, and other free music content. Covers rock, hip-hop, pop, electronic, folk, and other genres. No classical.