Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems
OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
LiveAgent - LiveAgent is a fully-featured web-based live chat and help desk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start your free 1 month trial today!
Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Pushy - Pushy is a reliable push notification gateway for time-sensitive, mission-critical apps.