Application Links (AppLinks)
is a plugin that allows you to link your JIRA
applications. You can even link your individual projects, spaces and repositories with each other, across the different applications. Applications Links is bundled with FishEye 2.4, Confluence 3.5, JIRA 4.3, and all later versions of those applications. In addition, Bamboo 3.1 is compatible with AppLinks. You can configure JIRA-to-Bamboo links via the JIRA administration screens.
Linking two applications allows you to share information and access one application's functions from within the other. For example, if you link JIRA and Confluence, you can view JIRA issues on a Confluence page via the JIRA Issues macro.
The quick start guide describes how to set up an application link between two applications with two-way Trusted Applications authentication: