Depending what you need it for, you might consider zencart. It is an open source product using php and mysql and has a strong group of developers as well as a large user group. It has localization into a number of languages, including Hebrew. It supports a variety of payment and shipping methods.
Like any product it has advantages and disadvantages, it has a fairly straightforward interface for users to add products, add payment and shipping methods and has a nice number of plugins and contributions from community members that may already provide solutions for things you would like to do. It scales fairly well too. It does not have as an intuitive templating system as joomla or drupal and upgrading versions is a longer process, although not insurmountable. Meira Josephy
