My list:

- Core Security Technologies: http://www.corest.com

- Three Melons: http://www.threemelons.com/en/

- Sabarasa: http://www.sabarasa.com/

- Nektra Advanced Computing: http://www.nektra.com

- Globant: http://www.globant.com

- Flaptor: http://www.flaptor.com/

- Popego: http://www.popego.com

- Zauber: http://zauber.com.ar