PayPal is a very quick method of sending money online. It is also quite secure and payments can be received as well as sent. Payments made carry no added fees but recipients of payments are required to pay a fee for the transaction. You are able to make payments just about anywhere in the world.
Another option is called Moneybookers. It is also very secure for making payments over the internet. They use a tool called an e-wallet which you use to shop all over the world. You use this e-wallet in all transactions, which you charge up with your own cash. Access is available in over 30 currencies and in most parts of the planet.
Dwolla is another way to go for online payments. Sellers have a cost of no greater than 25 cents for each of their business transactions and zero fees for processing. All accounts are opened without cost. You perform transactions with other Dwolla members which aids security and prevents fraudulent activities. It's very quick for processing any transaction as well.
Another alternative to AlertPay which is being put together is called PayBox. The service will be able to accommodate online transactions and will be secure and easy for all users. Scheduled to become available in 2011, they are aiming to create the ability of person-to-person online transactions as well as integrating businesses. They also plan to give users the ability to deal with major currencies throughout the world.