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Checkout this module with following features.Hope it fix your need.
Magento One step checkout ,with multiple languages and mobile theme support enable your customer to purchase products quickly without barriers of language and degree.
With magento extensions,your customer will check out faster by condensing all steps checkout into one step on a single page.
All steps customers have to do is filling personal information and choose payment methods in a required form on a single page. You will be amazed at the significant increase your sales after installing it.