Brandon University Library, Faculty Resource Guide on Open Data provides information on Canadian data including FRDR (federated research date repository) initiatives.
Brown University Library, Open Data Guide - provides great overview and tips on using open data before breaking into broad subject area. Great advice on understanding data file types.
McMaster University Library Guide to Open Resources includes a section on open data and links to McGill University Library's Citing and publishing data research data guide.
One of the best guides on open data is from the University of Texas at Arlington Library. Take a look at the Funder Requirements based upon the 2013 requirements from the Whitehouse Office of Science and Technology Policy. This guide is adapted from the UTA guide.
An overall outstanding Data and Open Scholarship series of guides is from Princeton University. Take a look at their data types & formats