Open-source customer engagement suite, an alternative to Intercom
Liquid markup language. Safe, customer facing template language
Ruby library for the Stripe API
Sell stuff and see what sticks
A super simple way to create & send invoices, receive payments online
A Modern Helpdesk Platform
Chess tournament organisation tool with swiss pairing system for free.
Rails3-based CRM(Customer Relationship Management) application
Fully customizable web chat created using AJAX.