WhatsMany - Send personalised WhatsApp messages in bulk

SMS Caster - SMS Caster app enables users to select as many phone numbers as they want from the contact list to send a single text message to all of them without having to spend any money.

LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.

SMSsoftware.org - Bulk SMS Software sends messages in bulk to multiple Android mobile users with distinct content in short time. Software imports the Contact list of individuals from computer storage to send bulk SMS and also skip the duplicate numbers automatically.

Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!

SendSMSMessages.net - Group SMS Transferring Software helps in sending messages to any GSM technology based mobile devices, Android Mobile Phones or major windows based pocket PC mobile devices. The application sends multiple messages to multiple users without internet.