Cathal Garvey created well known Dremel / drill low cost centrifuge "Dremelfuge". Here is interview with him where he describes various possibilities of his work. It could help bring more advanced medicine and science to developing world for fraction of the cost of conventional equipment while being open source.
Biohacking is expanding everywhere, workshops are held even in my country of Croatia. 3d printed tools like this could help people everywhere to get economically viable equipment.
If you want to make your Dremelfuge, files can be found here:
http://www.thingiverse.com/thing:1483
First post about Dremelfuge:
http://diy3dprinting.blogspot.com/2012/11/dremelfuge.html
Source: https://www.youtube.com/watch?v=98peQ7kS4-M