Application Links (AppLinks) is a bundled plugin that allows you to link your JIRA, Confluence, Bitbucket Server, FishEye, Crucible and Bamboo applications. 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. You can even link your individual projects, spaces and repositories with each other, across the different applications.
The Application Links plugin is bundled and shipped with the Atlassian applications.
The Javadoc for Application Links (AppLinks) is available via the links below: