volunteer developers

where one can ask for volunteers developers to join a project, instead of asking for money? We are working on a project based on an "everything is a node" approach and we clearly run (and will run) into a number of problems.

The site is online here http://eng.i-iter.org We are not looking for or willing to accept money, but will accept any coding help in instead. So this seems to be wrong place to publish such a call. Is there anywhere like "the right place"? :) Thanks