Points for Trello for Chrome
More About Points for Trello
Those points are cumulated and displayed in the list titles.
That allow cards to have a "weight", it is up to you to decide the meaning of that "weight" : days, $, hours... as you want.
Trello Points just make the sum for you, and add some other cool stuff (percentage, ratio filtered/visible)
Do not forget to customize the way Trello Points behave, just display the "Options" panel (right click on Trello Points icon on Google Chrom toolbar").
v. 0.40 : include contribs from Slav : fix handling of non usual points and add a notion of "reward points" for "TShirt size" point picker
v. 0.37 : name changed to "Points for Trello" as requested by Trello staff
v. 0.35 : new feature : negative points are now allowed! Also supports Google Chrome Version 19.0.1084.36 beta.
v. 0.34 : new feature : non numeric points, like MoSCow, or TShirt sizes (XS,M, L, XL) (based on an idea of 'slav'). You can configure the points system in the options page!
v. 0.33 : fix settings/options page with last version of Google Chrome
v. 0.32 : copy Trello Scrum css bug correction (91e4474569ef2027b9ca5df72fbc86aa843907da)
v. 0.2 : Extension options,
v. 0.1 : first available version. A comptete rework of original "Trello Scrum" extension with, IMHO, better filter handling.