I want to share opportunities for online volunteering

First there is www.freerice.com.

The site is a series of educational flashcards.  If you get the answers right a certain about of food will be donated if you get it wrong it just skips to the next question.  The flashcards come in a variety of subjects in the humanities, math, language learning, English, chemistry, and geography as well as SAT preparation.

Another good place to volunteer is http://rollingjubilee.org/

A Jubilee is an event usually described in the Bible as a cancellation of all debts. That the essential goal of Rolling Jubilee.  They buy up bad debt and forgive it.  I was originally started by the Occupy Wall Steet movement.  They have already raised enough to buy $11,342,585 in debt and cancel it.  This is mostly a donation project. It does give information about debt but to really help it is a good idea to give them money if you want to help with this cause.

There are also research opportunities for volunteerism

The site http://phylo.cs.mcgill.ca/ has a game that helps scientists map genetic diseases.  It is a puzzle game where you match up corresponding pieces of DNA.  It eventually will help scientists deal with genetic diseases. apparently computers have a harder time doing it than humans

A similar site is http://eterna.cmu.edu/web/ this site asks you to create your own strands of RNA for use to find different possible medicines.  It is another puzzle game that asks you to use bonding to create different shapes for the molecule.

I am not being paid to advertise these sites. I just think they are interesting.  I would also like to put up more.  I specifically am looking for volunteer sites that have the visitor do something beyond a simple awareness campaign or at least provide information on how to act within their own communities.  Leave any suggestions in the comments section.