Chris Clarke, Jason Gorman, Laurent Bossavit, Mock objects, Paolo Polce, Pascal Van Cauwenberghe, Willem van den Ende, Michael Mahemoff.
There is also a more comprehensive list of posts by category
and posts by source.
Satir systems webring
The Satir systems webring brings together a number of websites related to the work of Virginia Satir and systems thinking approaches.
The systems thinking aggregator brings together blog posts from people in the systems thinking community, including my own posts on systems thinking.