Why is this being thumbs up'ed. Has anyone here actually worked with these tools?
Magento is terrible and is open source only by the loosest definition of the term. No documentation, no real access into their source control.. wth!
This list misses so many other CMS'es out there with vibrant communities. It doesn't even mention Wordpress, Mephisto or Movable Type let alone Radiant, Spree or Zen Cart.