A question with this tag is about non-public (aka private) iOS APIs. Apple will reject apps that use non-public APIs, but they can be distributed using ad-hoc or enterprise distribution (on jailed and jailbroken devices), or through jailbreaks. The main difference from software development standpoint of iOS private API that such APIs aren't declared in header files. As result extra steps are required to figure out API signature for its usage.

A Parse SDK class that defines a query that is used to query for PFObjects.

R function that applies a function to multiple lists or vector arguments.

Couchbase Lite is an ultra-lightweight, reliable, secure JSON database built for online/offline mobile application needs and is part of Couchbase's Mobile product.

Evaluation board from STM. Based on the STM32F407VGT6, it includes an ST-LINK/V2 embedded debug tool, two ST MEMS, digital accelerometer and digital microphone, one audio DAC with integrated class D speaker driver, LEDs and push buttons and an USB OTG micro-AB connector.

Mixpanel is an analytics platform for tracking events on mobile and the web.

Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and Mono. Pythonnet provides a powerful application scripting tool for .NET developers. Using this package you can script .NET applications or build entire applications in Python, using .NET services and components written in any language that targets the CLR (C#, VB.NET, F#, C++/CLI) and CPython.

RapidMiner is an environment for machine learning, data mining, text mining, predictive analytics, and business analytics. RapidMiner is written in Java and it was open source. There is an open source version and an enterprise version with additional features and an API to write own extensions.

The Google Font Directory provides high-quality web fonts that you can include in your pages using the Google Font API.

Recoding refers to the process of modifying the values of dataset, matrix, or vector according to a set of rules by which input values are changed to replacement values.

A functional interface in the Java language refers to an interface with a single abstract method. @FunctionalInterface is an annotation which requires a particular interface declaration to conform to this specification. The target type of a lambda expression or method reference must be a functional interface. Functional interfaces are part of the Java 8 feature set.