Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Kannel - Open Source WAP and SMS Gateway
AirDroid - Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.
Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.
FreshSound.ru - FreshSound.ru is a user-friendly platform that allows you to create and store complete multi-track music projects on your Android phone or tablet device.