MIT OpenCourseWare
Massachusetts Institute of Technology has made it their mission to provide their courseware, lectures and assessments, freely available online.
Teachers: Visit the OCW Educator Portal
Learners: Browse their catalogue of chemical engineering courses and limit to video or audio to find classes with lectures that you can follow.
edX
You can follow classes for free on edX, a Massive Open Online Course (MOOC) provider, founded and governed by MIT and Harvard. Included in the catalog are a number of engineering courses at all levels. McGill University is a member of edX.
Coursera
Founded in 2012 by computer science professors from Stanford University, Coursera now includes content from over 150 partners (Yale, Johns Hopkins, University of Edinburgh, etc.). Chemical engineering courses are available, but also courses on writing and publishing.
FUN-MOOC
French language Massive Open Online Courses (MOOCs), from France and worldwide partners.