I wrote a little something about this a while back; see the post about the Bicimáquinas.  Matt, from Makeshift sent me this link and asked me to share it.  Have a look.  It is pretty inspiring to see Makers of this caliber.

From their YouTube page:

“Power Hackers, a series made in collaboration with Autodesk, profiles unexpected makers and designers who are developing creative climate solutions.

This video profiles the inspiring work of Maya Pedal, a Guatemalan organization that produces “bicimaquinas,” or bicycle-powered machines. The income-generating devices range from blenders to milling machines. Along with clever engineering, director Mario Juarez has succeeded in fostering pride in the community’s work.

Makeshift is a field guide to hidden creativity. Subscribe to our YouTube channel to follow original series like Power Hackers.”

While you’re at it, have a look at their quarterly magazine at http://mkshft.org.