This article starts from basic terms of ESB worlds and then provides details of the FuseESB with various examples. It contains step by step guide to install FuseESB, and develop and deploy OSGi bundle on FuseESB. Lets understand terminologies of the ESB world : ESB An Enterprise Service Bus (ESB) is a software architecture model used for designing and implementing the interaction and communication between mutually interacting software applications in Service Oriented Architecture.