Free open source e-shops

I was puzzled by the search for a free open-source engine for managing an electronic store on the LAMP platform. I want something like WordPress , just for the store.

There is experience in developing from scratch stores based on Microsoft .NET and Microsoft eCommerce Server. The latter in terms of functional richness is very cool, but the implementation leaves much to be desired and to use all this great hemorrhoids.

Googled here are some ready-made solutions:

• phpShop
  I did not find the demo and screenshots on the site. And somehow all modestly.
• osCommerce
  Pretty good site. Participate in exhibitions. There are screenshots - it seems to be quite functional.
• Modern merchant
  To version 1.0 has not yet reached. I did not find any screenshots, but it seems like an interesting system.
• Mymarket
  Oh miracle, there is a demo site , but for some reason it does not sell.
• Worksystem
  Something oddly incomprehensible.
• Zen-cart
  Something looks older. At first glance, did not like.
• WordPress Shop
  Oh miracle again! There is a plugin for WordPress that implements the store. I tried to put it, but something is buggy in it and has not yet understood.

None of the systems did not notice the Russifications. Strange.
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There is no desire to set up and study all systems, so comments from habrovtsy are interested with links to other engines, as well as experience in using and implementing.