The CustomWare JIRA - Salesforce.com plugin has a feature that lets you create JIRA issues from Salesforce.com Cases. Enabling this feature requires 3 steps

• Create the S-Control in Salesforce.com
• Add the S-Control to your Case page
• Create a Salesforce.com Case (Single or Multiple) Custom field (this step is optional).

Create the Salesforce.com S-Control.

• Log into Salesforce.com
• Click on the Setup link at the top of your Salesforce.com page
• In the App Setup link on the left hand side, expand the Build node, and then click on Custom S-Controls
• Click on the New Custom S-Control button
• For the Label field, enter JIRA_CREATE_CASE
• For the type, select URL
• For the content, enter

  http://<your-JIRA-URL>/secure/CreateIssueFromSFCase!default.jspa?caseId={!Case.Id}
  

  where <your-JIRA-URL> is where your JIRA instance is located
  

• Press Save

Add the S-Control to your Case page.

Create the S-Control Button

• In the App Setup link on the left hand side, expand the Customize node, expand the Cases node, and then click on Buttons and Links.
• In the Custom Buttons and Links menu, click on the New button.
• In the Label field, enter Save to JIRA
• In the Name field, enter JIRA_CREATE_CASE_BUTTON
• For Display Type, select Detail Page Button
• For Behaviour, select Display in new window
• For Content Source, choose Custom S-Control
• For Custom S-Control, choose JIRA_CREATE_CASE
• Click OK on the alert box (which should say *The new custom button or link will not be displayed to users until you add it to the page layout.

Add the button to your page layout

• In the App Setup link on the left hand side, expand the Customize node, expand the Cases node, and then click on Page Layouts.
• Click the Edit link next to the Case Layout Page Layout Name.

• Click on the Detail Page Buttons item in the Button Section group, then click the Edit Properties button. A popup similar to the one below should show.

• Add the Save to JIRA button to the Selected Buttons list.
• Click OK
• Click OK on the alert box.

• Click Save on the Page Layout form.

Now when you look at a Case in Salesforce.com, the Save to JIRA button will show up.