Public Library of Science (PLOS) is offering grants for conference travel. They are small purses ($500) and the requirements are stringent — must be a grad student or graduated a PhD in past 5 years, must have published in PLOS journal, must be presenting during a narrow range of dates — but they still might be worth applying.
More information here: plos.org/ecr-travel-awards
Dr Geoff Kushnick 