I really like what Trello can do if only it could also have story points and trajectory for projects. Is there any way of doing that?
We couldn't wait for the api to be released. So we developed a Chrome Extension that adds story points to Trello.
The functionality is very lightweight. Just add the storypoints for a card within parentheses, like:
(4) As a user I want to click a button.
The extension will automatically pick up the story points and nicely show them in the upper right corner of the card. All the story points within a list are counted and the total is shown in the list title.
As for velocity tracking, I prefer to do that in a separate spreadsheet and do my analysis there.
According to their FAQ, no:
Is there a way to generate story points to use with my Agile team? Kind of. I guess story points are an estimate of how long something will take to do. This falls into the idea of a custom property for a card that you’d like to have meaning. For example, if your Trello board was a Sales Leads board, you might want all your cards to have potential deal size $$$ on them. Right now we don’t want to cram Trello into any specific use, so something like this would have to be provided by a custom plugin (see the API question).
I've just started using Scrum for Trello Chrome extension, and I like that it marks up the points (which are saved as a number in parentheses) as badges. It tallies the points at the top of each List.
See also Plus for Trello Chrome Extension to track Spent and Estimate with a lot of reporting features incl. velocity burndown chart.
This Trello report generator has velocity tracking included. I've not managed to get it to work but then not used it much!
You can use the free Card Size Power-Up: Card Size for Trello