Vivix – See inside JavaScript as it executes (open source)
Event loop visualization with microtask and macrotask queues finally makes async legible.

Code execution as a literal circuit board — watch data flow through gates in real-time.
Developers learning algorithms, educators teaching code flow
Python Tutor · Algorithm Visualizer · VisuAlgo
Event loop visualization with microtask and macrotask queues finally makes async legible.
Novel pattern-classification approach to autorouting, but unproven against real boards.
First production quantum simulator that runs entirely in TypeScript, no Python.
Visual flowchart plans before code execution beats Cursor's text-only approach.
Adds circuit breakers and request deduplication to native fetch via a plugin system.
Browser-only .pptx parsing when every other converter uploads your deck to a server.