Watch the organic organization of an open source project  like OTB and how contributors modify and expand the source code!

[youtube=http://www.youtube.com/watch?v=rScAtvKqWH4]

This video was generated with the open source software version control visualization tool Gource.

It shows modifications  in : OTB, OTB-Applications, Monteverdi, OTB-Documents, OTB-Qgis-plugins and OTB-Wrapping source code repositories.