Task manager Wunderlist has updated to version 3.1.1, adding support for Dropbox. You can now add a file from Dropbox to any of your items.
Dropbox support lets you add a link ot a file in Dropbox as an attachement. Tap the paperclip down at the bottom of a task's page, then select Dropbox. You'll be taken to the Dropbox app, where you can select your file. Dropbox will generate a link, which will then automatically be pasted into your Wunderlist item's page as a small card.
Wunderlist has also made some fixes and improvements in this update. It now automatically grabs your profile picture when you sign in with Google+. They've also tweaked some UI elements for the iPhone 6 and iPhone 6 Plus.
Wunderlist can be downloaded for free from the App Store.