Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
Zeplin - Collaboration app for UI designers & frontend developers
Ozeki NG SMS Gateway - Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application.
Pamela for Skype - A versatile and easy to use Skype audio and video recording software. Features
Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.
ActiveWords - Auto correct on steroids