A centralized location manager for your app.
Luigi is a Python module that helps you build complex pipelines of batch jobs. It handles dependency resolution, workflow management, visualization etc. It also comes with Hadoop support built in.
An Obj-C message forwarder class, for when you don't have access to the source of the sending object.
A UITableView and UICollectionView delegate and datasource that provides a simpler unified interface for describing your sections and cells.
Distributed SQL query engine for big data
A simple set of adminz pages for use in go services.
An HFile-backed Key-Value Server
Reusable libraries for building Go services
Non-Metric Space Library (NMSLIB): A similarity search library and a toolkit for evaluation of k-NN methods for generic non-metric spaces.
Foursquare Library for React
Load balancer manager with knowledge of Apache Aurora's service discovery mechanism and integration with Aurora's task lifecycle.
Foursquare native authentication makes it easier for your app's users to connect with Foursquare. Unlike web-based OAuth, native authentication re-uses the Foursquare app's user credentials, saving users the hassle of re-logging in to Foursquare within your app.
A monorepo that holds all of Foursquare's opensource projects
Scriptable Headless WebKit
A collection of PHP utility classes
Command line interface for Phabricator
scikit-learn: machine learning in Python
Caffe: a fast open framework for deep learning.
An SDK to help developers add a place picker to their app and also quickly access the Foursquare place that their user is at.
java driver for mongo
Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.
Cloudera Manager datasource for Grafana 3.x
Pants Build System
URL routing framework for iOS
Timberlake is a Job Tracker for Hadoop.