# Presentations & Videos
## Building Mobile Apps with Apache Usergrid
- Screen-cast of a talk given by Dave Johnson at the All Things Open 2014, Raleigh, NC.
## How to Contribute to Apache Usergrid
- David Johnson at [ApacheCon NA 2014](http://apacheconnorthamerica2014.sched.org/event/29971aabd3c86398be2ae93403c7d1d2)
## Apache Usergrid Internals
- Sungju Jin
## Open Source Mobile Backend on Cassandra
- Ed Anuff
## Usergrid Overview
- Ed Anuff