Jeff Sutherland is a co-creator of Scrum with Ken Schwaber. He is now Chairman of the Scrum Training Institute and CEO of Scrum, Inc. His Scrum blog is a resource that you must read and follow if you are interested in Scrum.
Other Resources for Scrummasters, Product Owners and Agile Developers: podcasts, approaches, groups
Scrum.org was founded by Ken Schwaber, one of the creators of Scrum,. Schwaber initially attempted to develop Scrum.org’s programs while part of the Scrum Alliance. Ultimately, he found that to accomplish his goal of improving Scrum knowledge, training, and implementations, he would need to break away from the Scrum Alliance. Scrum.org offers scrum resources, assessments, certifications and training programs. http://www.scrum.org/
The company of Mike Cohn, one of the most important Scrum expert. Besides his blog, you will find on his web site interesting material regarding his presentations and some tools that you can use for Scrum. http://www.mountaingoatsoftware.com/
The Agile Alliance is a nonprofit organization with global membership, committed to advancing Agile development principles and practices. We believe that Agile approaches deliver higher value faster, and make the software industry more productive, humane, and sustainable.
The Scrum Alliance is a not-for-profit professional membership organization created to share the Scrum framework and transform the world of work.