Aceflex e-commerce software (http://www.aceflex.com/usa/b2c_e-commerce_software.asp) is extremely competitive in US, UK, Continetal Europe, Japan, Asia and Australia. Development team is also very helpful especially in terms of addition new features and quick fixes. Functionality for customer services which is growing exponentially. Check the newly launched live chat service at http://www.aceflex.com which is also developed by them. Seems like they speak many languages and can be in real value for merchants expanding overseas.