Here is a list of technologies developed by Facebook and its subsidiaries:
React: A JavaScript library for building user interfaces.
React Native: An open-source framework for building mobile apps using React.
GraphQL: A query language for APIs.
HHVM: A virtual machine for executing programs written in Hack and PHP languages.
Presto: A distributed SQL query engine.
PyTorch: An open-source machine learning library.
RocksDB: A high-performance embedded database.
Buck: A build system optimized for large-scale, fast, and incremental builds.
Osquery: A tool for exposing an operating system as a relational database.
Jest: A JavaScript testing framework.
Yarn: A fast, reliable, and secure package manager for JavaScript.
Origami: A prototyping tool for designing and testing user interfaces.
Hack: A programming language developed by Facebook.
React VR: A framework for building virtual reality experiences using React.
Facebook SDK: A software development kit for building apps that integrate with Facebook.
Instagram Engineering Blog: A blog that showcases Instagram's engineering and design work.
Boomerang: An app for creating mini videos that loop back and forth.
Hyperlapse: An app for creating time-lapse videos.
Spark AR: An augmented reality platform for creating AR experiences for Instagram and Facebook.
Oculus: A virtual reality hardware and software company acquired by Facebook.
Onavo: A mobile analytics company acquired by Facebook.
Parse: A mobile backend as a service platform acquired by Facebook.
WhatsApp: A messaging app company acquired by Facebook.
Giphy: A GIF search engine and database company acquired by Facebook.
LiveRail: A programmatic video advertising platform acquired by Facebook.
This list is not exhaustive, but it covers some of the major technologies developed by Facebook and its subsidiaries.