These are sites or applications, you can browse (are public - in production), donde with GeneXus X or GeneXus X Evolution 1.

ubicando.com
http://www.ubicando.com

GX2 Technología
http://www.gx2.com.br

MundoBasquet
http://www.mundobasquetweb.com.ar (by saasforeach.com)

Portal da Transparência
http://www.etransparencia.com.br

La Valenziana
www.lavalenziana.com.ar (by www.jlbellon.com.ar)

Warner Music
www.warnermusic.com.br (by www.instyledm.com)

Universal Music
www.universalmusic.com.ar (by www.instyledm.com)

Punto Compras
www.punto-compras.com (by http://www.sie-sa.com.ar/)

ZetaCuentas
www.zetacuentas.com.uy (by www.z.com.uy)
...your finances online

Buenos Aires Users Group
www.bairesgug.com.ar (by Paulo Sapuppo)

United Nations - Argentina
 http://www.onu.org.ar (by Jobum)

Arte Quadros - Brazil
http://www.artequadros.com.br

Expresate Ya! - 
http://www.expresateya.net (by Daniel Monza)
 

Time Manager (GeneXus X Evolution 1 + K2BTools 4)
www.timemanager.com.ar (by LegadoIT)

Job Manager (GeneXus X Evolution 1 + K2BTools 4)
www.jobmanager.com.ar (by LegadoIT)

GeneXus marketplace (GeneXus X Evolution 1)
http://marketplace.genexus.com (by Artech)

GeneXus International Meeting (GXportal + GeneXus X Evolution 1)
http://www.genexus.com/encuentro (by Artech)