AASHE: Association for the Advancement of Sustainability in Higher Education

For members only, they have lots of resources and listings including:
Academic Programs in Sustainability

Degree Programs in Sustainability
o Bachelor's Degree Programs Member-only resource
o Master's Degree Programs Member-only resource
o Doctoral Degree Programs Member-only resource
Non-Degree Programs in Sustainability
o Minors Member-only resource
o Certificates Member-only resource