I did a little digging on our website and found that Esri offers GIS mapping software and worked with Auburn, AL to use the technology to engage citizens: http://transformgov...
I called them to see if they offered products that would allow citizens to add content, and it seems that they would be able to. You can check out their site here: http://www.esri.com/
Also, if you would like to speak to someone directly, it looks like an Alex Munoz covers your region and can be reached at 909-793-2853 ext. 1597
Hope this helps!