Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Shopperations - For a shopper marketing collaboration system that tracks budgets, automates reporting & calendars, & streamlines post-event analysis
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Looklet - Looklet provides retailers with an efficient in-house studio and creative styling tools to produce high quality dynamic fashion images.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Trailblazer - A new architecture for Rails.