QuestDB is an open source time-series database for fast ingest and SQL queries

Android application powering the mirror in my house

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

Unlock your Sony camera's settings

Airbnb's Open-source Distributed Delayed Job Queueing System

logsniffer is a sophisticated open source web tool for parsing, viewing, monitoring and analyzing log data - smarter, collaborative and easier. [No longer maintaned]

Plugin for PhpStorm IDE. Adds auto-completion support for various built-in PHP functions, where parameter is a string literal.