I spotted this in the QGIS blogs page and thought it may be of interest. For example, if you’re interested in collecting data about post boxes/listed buildings/cafes/etc you could set up a project in ‘Roam’ to help you. Other people could also help you with your project (gathering a consistent set of data using the project template).

‘Roam’ is a standalone application that was created to do data collection. The primary use of Roam is in situations where you might not have internet connection. It comes with a config manager that can be used to create and manage Roam [data collection] projects.

It’s Windows tablet only at the moment, but aims to extend to Android. Worth keeping an eye on development as it could help data collection for OSM.

More info here.