iVolunteer is a web platform written in Meteor.js. We built this to help iVolunteer foundation which had not very useful web presence. Requirement was to create a web platform for allowing people to vote and promote volunteers, ngos and corporates who serve social causes.
We chose meteor to built their app so it would be easy for them to hire new developers to grow this project and use it in production. Meteor also make it very easy to create mobile apps using the same code, and provide the platform for providing real-time interaction to its users.
It's easy to develop, maintain and deploy, so it was the best choice for the NGO's app; reasons being that it'll help them to hire new developers easily, and new developers could understand the code/project easily.