I am maintaining Gmvault (http://www.gmvault.org) and unfortunately I have the same issue. I get frustrated because I spend most of the time supporting users. It is good but I have plenty of ideas that I would like to implement in subsequent versions and I do not progress.

I would like to attract developers to help me. Which channel is the best in your opinion to do that ? I use Github so the source is available and the open issues are also public there.

Where would you advertise the need for help to be sure to find some somebody ?