geokit/geokit — pull request #125 by jlaxson (2014-01-27 04:18:22+00:00)
Title: Implement HTTPS on Google, Bing, Yahoo, MapQuest, FCC geocoders

Per issue #124. The above named are the 5 that I found did HTTPS on the publicly available service, but there may be more of them that aren't as simple to figure out.