Tasmota : Tasmota is an open source firmware for ESP8266 based devices.
Total local control with quick setup and updates.
Control using MQTT, Web UI, HTTP or se...
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
Task : Task is a task runner / build tool that aims to be simpler and easier to use than, for example, GNU Make.
Figproxy : Figproxy is a tool that enables rapid prototyping of tangible user experiences allowing Figma prototypes to talk to the external world.
More specifica...
DeepForge : DeepForge is a development environment for deep learning designed for
simplicity, collaboration and reproducibility of experiments
PlatformIO is an open source ecosystem for IoT development
Cross-platform build system. Continuous and IDE integration. Arduino and MBED compatible