Various datasets regarding Singapore. For now, it’s mainly GeoJSON files for election constituencies and administrative boundaries.
2011 constituencies: http://sgmaps.blogspot.sg/p/electoral-map.html
2015 constituencies: http://www.eld.gov.sg/pdf/White%20Paper%20on%20the%20Report%20of%20the%20Electoral%20Boundaries%20Review%20Committee%202015.pdf
2011 parliamentary results: http://www.eld.gov.sg/elections_past_parliamentary2011.html
administrative boundaries: http://data.gov.sg/Metadata/OneMapMetadata.aspx?id=MP14_SUBZONE_WEB_PL&mid=203209&t=SPATIAL