DM Pilot - The Easiest and Most Reliable Way to Send Automated DMs
Mockaroo - A realistic data generator to test your app
Auto Message - Auto Message is a scheduling app that offers several features such as sending automated emails, automatically answering calls & sending SMS/text messages.
JSON Generator - Create mock and sample JSON using a powerful template syntax
Auto Reply for whats - Auto Reply for whats is a bot that automatically replies to received messages, and you can also use its features to build campaigns for customer support.
Softbuilder SB Data Generator - SB Data Generator is a simple and powerful tool to generate and populate selected tables or entire databases with realistic test data.