OpenHantek is a free software for Linux users which provides an alternative to the official Hantek DSO software. It is designed for Hantek (Voltcraft/Darkwire/Protek/Acetech) USB DSOs, and is based on HantekDSO. The user interface is written in C++/Qt 4 and uses OpenGL to draw the graphs. OpenHantek has been tested with the DSO-2090, however, test results with other models are welcome.
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.
