Hello Fellow is a Trello Clone with boards, lists, cards, checklists,labels and smooth drag and drop functionality. A one-page application mainly built on Backbone with the database handled by Rails.
It features very deeply nested views, sortable cards and lists that presist after refreshing, and an overridden Backbone parse method to handled nested JSON data, which, subntantially reduce both the size and quantity of database queries.
Written in 7 days.