360° Newsletter - Jack Morton Worldwide: Bimonthly newsletter about branding, marketing, and corporate communications.
CompanyNewsletters.com: Large collection of articles on how to write and produce company newsletters, whether a traditional printed or online version.
International Association of Business Communicators.: A worldwide learning community for professionals committed to improving the effectiveness of organizations through strategic communication. Articles, conferences, career opportunities.
Ivy Sea Online: A wide range of free articles on communication within and from an organization. Organizational communication articles and tips.
Melcrum: Case studies, research, how-to guides, events, networks and publications for corporate communication professionals.
Put It In Writing: Writing company business newsletters.
The Cluetrain Manifesto: A strongly reasoned plea for corporate communicators to speak with a human voice.
The Corporate Writer: A freelance writer shares her expertise and knowledge with other writers offering an e-course, an e-book, and reports.
The Editorial Eye: Dozens of articles relevant to corporate editors and writers. Topics include today's usage dilemmas, style sheets, trademark controversies, web editing, estimating editorial jobs, and software.