You need Confluence and JIRA. Summary of steps:

• Configure Confluence to trust JIRA via Application Links. See Linking to Another Application. Follow the prompts to choose either OAuth or Trusted Applications, depending on your setup.
• In JIRA, subscribe to all your Confluence gadgets. See the JIRA administrator's guide. Alternatively, you can add just this one gadget to the JIRA gadget directory. See the JIRA administrator's guide.
• Add the gadget to your JIRA dashboard. See the JIRA user's guide.