Jira Timesheet Report and Portlet Plugin

Plugin enables additional time tracking means:

Pivot project report - displays a summary of worked hours for project for certain period, where columns a project users (resources) and rows are project issues (tasks). Totals are also displayed: on row - total worked for the issue during the specified period; on column total worked hours by user for the specified period.
User Timesheet report - with possibility to chose user and period
Time sheet gadget - shows logged user' work load during the week.