Devart Data Generator for MySQL - Populate MySQL databases with massive volumes of random test data using dbForge Data Generator for MySQL. Download a trial version now!
JSON Generator - Create mock and sample JSON using a powerful template syntax
Mockaroo - A realistic data generator to test your app
Generate Data - GenerateData.com: free, GNU-licensed, random custom data generator for testing software
Ideas Are Worthless - Like Product Hunt. But for Ideas.
JSON Master - ⚡ Auto-formats JSON responses in Chrome