One of my favourite projects to work on was with inaturalist.org . It's open sourced on github (https://github.com/inaturalist https://github.com/inaturalist)

One of my favourite projects to work on was with inaturalist.org . It's open sourced on github (https://github.com/inaturalist https://github.com/inaturalist) .. we were making the New Zealand port : http://naturewatch.org.nz/ http://naturewatch.org.nz/ Has Android & iOS ports..