Expensebalance is a project mainly written in JAVASCRIPT and RUBY, it's free.
My girlfriend and I split some living expenses. This is a jQuery mobile app that lets us track who's 'ahead' and 'behind' on the list from our android phones.
Welcome to ExpenseBalance
Karen and I split living expenses, and this is an easy way to keep track.
It's built for couples who need to track who's "ahead" and who's "behind". Currently it only supports one couple per app, but I hope to expand it later.
The app is built on Rails 3 and jQuery mobile, and uses Devise for authentication. All templates are written in HAML.