Like Slack except P2P, offline friendly, and open source

An open-source feature flagging and A/B testing tool

High Performance Australian Cloud Servers

Set of tools to aid in developing React applications with the Flux architecture

A new background job system by the company behind Sidekiq

MySQL Performance Analyzer by Yahoo

Beautify, unpack or deobfuscate JavaScript and HTML, make JSON/JSONP readable, etc.

Create test databases that are populated with fake data

Time tracking and insights for projects on Trello

Visualize your project progress on large screens

Front-end framework optimized for internal apps

A building block for an open source AWS lambda

The iOS and Android App for Heroku. The only Heroku App with console access and two-factor auth.

IoT operating system for microcontrollers

A general purpose real-time charting library for building beautiful, smooth, and high performance visualizations.

Application Architecture for Building User Interfaces

An ML-like language aimed at program verification

Fast, fully managed, petabyte-scale data warehouse service