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WSO2 ESB is a fast, light-weight, and versatile enterprise service bus. It is 100% open source and released under the Apache License v2.0. Using source and is released under Apache Software License Version 2.0, one of the most business-friendly licenses available today. Using WSO2 ESB you can perform a variety of enterprise integration patterns (EIPs), including filtering, transforming, and routing SOAP, binary, plain XML, and text messages that pass through your business systems by HTTP, HTTPS, JMS, mail, etc.
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