BookBoon provides textbooks in microeconomics, macroeconomics, and a variety of other related fields. The books can be downloaded for free but do contain some minimal advertising.

This introductory Economics textbook covers a wide variety of topics.

Course syllabi, lecture notes, reading lists and problem sets from the Fulbright School's many economics courses.

Khan Academy offers short videos on topics in microeconomics and macroeconomics. (Scroll down to the Browse Our Library heading to find the links.)

Use MERLOT to locate many open resources available for economics online.

MIT's Economics department offers an extensive series of online courses. Courses generally include lecture videos, assignments, exams, and more.

From the University of Minnesota, this collection of e-textbooks includes books on economic analysis, microeconomics, and more. The books are openly licensed, complete, and suitable for adoption. There is also a paid option for students who want to get a print edition.

Using the US and Mexico as the main example, this free course examines how inequalities in access to material wealth can lead to border tensions.

The Story of Stuff is an illustrated lecture by author and environmental activist Annie Leonard that examines the environmental and social repercussions of the U.S. consumer culture. The Story of Stuff Project has expanded with videos addressing environmental studies topics and solutions.