Scrum for Trello adds functionality to the awesome trello.com for use in Scrum projects.
Add estimates or record time-spent directly on Trello cards. Shows sums at the top of each list and the top right corner of each board.
This is a free and open source extension in Chrome, Firefox, and Safari.
Download Scrum for Trello Chrome extension(this is the browser you're using)
Download Scrum for Trello Firefox extension(this is the browser you're using)
WARNING: This extension can only work in Safari 6 and higher.Download Scrum for Trello Safari extension
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To use, simply open a Trello card click the title of the card to edit it. There are buttons with Fibonacci numbers (1, 2, 3, 5, 8, ...etc.) to let you quickly add an estimate. You can also type in the estimate or the time-spent. To type an estimate, just surround it in parentheses like this: (4) to type the amount of time-spent, put that in square brackets like this: . Those numbers can appear anywhere in the title, but a common convention is to put the estimate at the beginning of the card and the time-spent at the end, like this: "(8) Create Firefox Extension [4.5]". Decimal numbers are accepted for both values.
Integration with Burndown for Trello
The 'Burndown for Trello' extension adds burndown charts to Trello boards. Since it uses estimates and time-spent, Burndown For Trello has integrated with Scrum for Trello. If you have a Pro account on Burndown for Trello, it will use the estimates and time-spent that you enter in Scrum for Trello, so you never have to re-enter them.