Hyperion is an in-app design review tool to inspect measurements, attributes, and animations. Hyperion is open source and sits on top of plugins, allowing you to add your own plugins and customize your toolset.
Hyperion for iOS is live on GitHub, Android forthcoming.
Uber's geospatial analysis tool for large-scale data sets
kepler.gl is a data-agnostic, high-performance web-based application for visual exploration of large-scale geolocation data sets. Built on top of deck.gl, kepler.gl can render millions of points representing thousands of trips and perform spatial aggregations on the fly.