Web Attachments Power-Up has been released11 Jul 2014

From images on Flickr, notes on Evernote, to GitHub pull requests and documents stored on internal network, the new Web Attachments power-up allows you to easily attach anything to tasks. Even links to other cards can be attached to create simple dependencies.

Web Attachments Power-Up in kanbantool.com

To get started, enable the Web Attachments power-up on the Settings > Power-ups page.