In the DemocracyOS software each citizen can either cast their vote or can delegate it on a trusted peer - wikipedia 
Delegation is transitive and can be determined by topic (i.e. a user can delegate economics-related votes on a certain user, environment-related and health-related votes in another user, and keep the remaining topics for himself.
The Net Party (Partido de la Red, in Spanish) is a political party headquarted in Argentina, with a global projection based on Internet, that proposes an online form of Liquid Democracy - wikipedia
Since this app´s innovation is that it is linked to the formal political system through a Trojan Legislator, identity validation is a crucial component and is achieved through a separate app called NetIdentity.
The Spanish political party Podemos gave us very favorable feedback about DemocracyOS. They used it for internal decisions so in this case, the adopters and the users are the same people - opensource.com
The Mexican government had such a great team which did a very nice job using DemocracyOS to discuss their Open Data policy. Over a thousand citizens participated in the discussion, and we consider it a success. You can learn more about this (the site is in Spanish) at - datos.gob.mx
Pia Mancini is one of the founders of the Net Party, a political party headquartered in Argentina.