1. Google Wallet
At the moment, Google wallet is mainly used in the US but it accepts credit or debit cards from many countries. It acts like a digital wallet, more so in the US as you can tap to pay in-store with an NFC-enabled Android device. As for online shopping, there are a handful of online merchants that accept checking out with Google Wallet.
Unlike PayPal, Google Wallet is strictly for merchants, so you cannot send money to another Google Wallets users. However, there are no chargeable fees when using Google Wallet online or in-store, this is good if you're shopping on one of their online merchants where it only accepts US credit cards and not your local one.
2. Money Bookeers
Money Bookers (Currently also known as Skrill) you to send and receive money to other users. It works with other online banking services in certain countries and for all other countries, you can send and receive money with a debit or credit card. Each country is also charged differently when sending and withdrawing funds from MoneyBookers.
Moneybookers Focuses more on sending money between users as there are very few online merchants that allow you to checkout with its services. However, their main focus of being able to send money of any currency to anywhere in the world is solid, making it a close competitor to paypal.
Paymate is a great way for sellers based in Australia and New Zeland to get money from international buyers from many countries. Sellers from the two countries can use Paymate on their website or on Ebay Australia for a small fee.
Formally known as a AlertPay, Payza lets you send and receive money from 190+countries across 21 countries. The service is finally based in US and Canada but also supports certain banks adn credit.debit cards from their recognized countries. You can add funds to your Payza account via bank transfer or credit card, send money to other users, and even request money through invoices.
Payoneer is an interesting way to pay for online shopping. Registering for the service grants you access to a prepaid MasterCard which will be sent to your doorstep. Creating an account is free and you're only charged when you activate the card. Once the card is activated, you can load money into the card from your local bank or other credit cards.
An activated Payoneer card can be used in many countries and in different currencies. Of course, maintaining the purpose items and even withdraw money from a MasterCard ATM.