LiqPay is a popular payment system which can help you to top-up your balance by one of the supported ways.
WebMoney Transfer is a system of instant Internet settlements, established in 1998. Each user has his personal account, which is called WMID (consists of 12 digits, each WMID in the system is unique). Several purses can be opened inside it — special accounts, where the "title units", nominated in different currencies, are recorded.