Event Taps Testbench is a free tool for software developers to analyze and test their applications' compatibility with Quartz Event Taps. It can also be used to simulate virtual input devices, assistive applications for people with disabilities, remote control software, and drivers for hardware input devices such as trackballs and tablets. The utility allows users to configure and install multiple event taps, monitor user input events in real time, and set up custom responses to user input.
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.
