Challenges you might be interested in:
The Healthy Neighbourhoods Data Challenge
The Challenge has officially announced its five finalists:  the City of Calgary,  Local Logic,  Peel Public Health,  Wellington-Dufferin-Guelph Public Health, and  CounterPoint (Winnipeg Trails Association). These organizations impressed the judges with their novel data sets, data sources, and analytical methodologies to improve our understanding of physical environments and linkages to health outcomes.
Each of the finalists will receive $10,000 to continue developing their solutions in Phase 2.