Libraries for ChromeOS

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  • 1
    ProgressManager

    ProgressManager

    Listen the progress of downloading and uploading in Okhttp

    ProgressManager is an Android networking utility designed to monitor and manage upload and download progress for HTTP requests built with OkHttp. The library simplifies the implementation of progress tracking in Android applications by wrapping request and response bodies with listeners that report transfer status in real time. It is especially useful for applications that handle file uploads, media downloads, or large network transfers where users expect visible progress feedback. The project supports integration with Glide and other Android networking workflows, enabling developers to track image loading and resource downloads without extensive boilerplate code. Its architecture emphasizes minimal intrusion into existing networking stacks while maintaining compatibility with common Android development patterns. ProgressManager is widely used in applications requiring responsive file transfer interfaces and efficient network progress monitoring.
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  • 2
    Projects-Solutions

    Projects-Solutions

    Links to others' solutions to Projects

    Projects-Solutions is a companion repository to Projects; while Projects contains the list of project ideas, Projects-Solutions links to solutions submitted by other users in multiple programming languages. It is effectively a community-driven gallery of implementations of the tasks defined in the “Projects” list, allowing learners to compare their solutions, study others’ code, and improve their approach. The repository aggregates links and resources rather than necessarily hosting all code directly; it serves as an index. The README makes clear that the goal is to build a repository of implementations across languages, showing that the same problem can be solved in Python, Java, Go, JavaScript, C++, etc. For learners it is particularly useful to see how others structure their projects, how they implement algorithms in different languages, and how to cleanly organize a solution.
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  • 3
    Prometheus JVM Client

    Prometheus JVM Client

    Prometheus instrumentation library for JVM applications

    It supports Java, Clojure, Scala, JRuby, and anything else that runs on the JVM. If you use Maven, you can simply reference the assets below. The latest version can be found on in the maven repository for io.prometheus. By default, counters, histograms, and summaries export an additional series suffixed with _created and a value of the unix timestamp for when the metric was created. Building the repository needs Java 11 (The project the project still supports Java 6 and Java versions > 11 dropped support for Java 6 output). We recommend to use an up-to-data Java 8 installation. The project provides the maven wrapper and therefore no local maven installation is needed. To build the repository just call ./mvnw verify.
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  • 4
    Prompt Engineering Interactive Tutorial

    Prompt Engineering Interactive Tutorial

    Anthropic's Interactive Prompt Engineering Tutorial

    Prompt-eng-interactive-tutorial is a comprehensive, hands-on tutorial that teaches the craft of prompt engineering with Claude through guided, executable lessons. It starts with the anatomy of a good prompt and moves into techniques that deliver the “80/20” gains—separating instructions from data, specifying schemas, and setting evaluation criteria. The course leans heavily on realistic failure modes (ambiguity, hallucination, brittle instructions) and shows how to iteratively debug prompts the way you would debug code. Lessons include building prompts from scratch for common tasks like extraction, classification, transformation, and step-by-step reasoning, with checkpoints that let you compare your outputs against solid baselines. You’ll also practice advanced patterns such as tool use, constrained generation, and response validation so outputs are trustworthy and machine-consumable.
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    PropertyAccess Component

    PropertyAccess Component

    Provides functions to read and write from/to an object or array

    Symfony PropertyAccess is a component that provides a uniform way to read and write object properties and array elements. It allows developers to access nested properties dynamically without directly interacting with the underlying data structure. PropertyAccess simplifies the manipulation of data objects, especially in form handling and data mapping scenarios. It is commonly used in Symfony applications but can be utilized in any PHP project.
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  • 6
    Protip

    Protip

    A new generation jQuery Tooltip plugin

    A new generation jQuery Tooltip plugin.
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  • 7
    Protobuf Gradle Plugin

    Protobuf Gradle Plugin

    Protobuf Plugin for Gradle

    An officially supported Gradle plugin that automates Protocol Buffers (.proto) compilation, code generation, and integration with gRPC across various source sets. It simplifies protobuf setup, supporting multiple languages and output configurations.
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  • 8

    ProximityForest

    Efficient Approximate Nearest Neighbors for General Metric Spaces

    A proximity forest is a data structure that allows for efficient computation of approximate nearest neighbors of arbitrary data elements in a metric space. See: O'Hara and Draper, "Are You Using the Right Approximate Nearest Neighbor Algorithm?", WACV 2013 (best student paper award). One application of a ProximityForest is given in the following CVPR publication: Stephen O'Hara and Bruce A. Draper, "Scalable Action Recognition with a Subspace Forest," IEEE Conference on Computer Vision and Pattern Recognition, 2012. This source code is provided without warranty and is available under the GPL license. More commercially-friendly licenses may be available. Please contact Stephen O'Hara for license options. Please view the wiki on this site for installation instructions and examples on reproducing the results of the papers.
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  • 9
    Psl

    Psl

    Centralized, well-typed, non-blocking set of APIs for PHP programmers

    Psl is a standard library for PHP, inspired by hhvm/hsl. The goal of Psl is to provide a consistent, centralized, well-typed set of APIs for PHP programmers. A modern, consistent, centralized, well-typed, non-blocking set of APIs for PHP programmers.
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    Public APIs

    Public APIs

    A collective list of free APIs

    public-apis is a collaboratively maintained repository that provides an extensive, categorized list of publicly available APIs for developers. Curated by community contributors and the team at APILayer, it serves as a centralized resource for discovering APIs across a wide range of domains, including data, machine learning, weather, entertainment, and finance. The project aims to make API exploration and integration more accessible by offering a single, organized index of open and free-to-use APIs. Developers can leverage this list to enhance their products, prototypes, or research projects without the need to build data sources from scratch. The repository’s open nature encourages contributions, allowing anyone to submit new APIs or updates through pull requests. Over time, public-apis has evolved into a trusted and frequently updated reference point within the developer community. It also provides an active community space, including a Discord server.
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  • 11
    PulledPork

    PulledPork

    Pulled Pork for Snort and Suricata rule management (from Google code)

    PulledPork is a Perl-based script that automates the management of Snort and Suricata IDS/IPS rulesets. It streamlines the process of downloading, parsing, and updating rules, ensuring that intrusion detection systems remain current and effective.​
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  • 12
    Pulley

    Pulley

    A library to imitate the iOS 10 Maps UI

    A library to imitate the drawer in Maps for iOS 10/11. The master branch follows the latest currently released version of Swift. If you need an older version of Swift, you can specify it's version (e.g. 1.0.x) in your Podfile or use the code on the branch for that version. Older branches are unsupported. Pulley 2.9.0 has new properties to support a new display mode. The base functionality should work without any significant changes. The biggest change is the new display mode of .compact to replicate Apple Maps Behavior on the iPhone SE size class devices. Pulley is an easy to use drawer library meant to imitate the drawer in iOS 10/11's Maps app. It exposes a simple API that allows you to use any UIViewController subclass as the drawer content or the primary content.
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  • 13
    Pundit

    Pundit

    Minimal authorization through OO design and pure Ruby classes

    Pundit (varvet/pundit) is a Ruby gem that provides a simple and effective framework for adding authorization logic to Rails (or other Ruby) applications. It centers around policy classes—one policy per model or resource—that define what actions a given user is permitted to perform (e.g., show?, update?, destroy?). Each policy method returns a boolean, and can be structured using combinators or shared logic to keep things DRY. In controllers and views, Pundit provides helpers like authorize, policy_scope, and policy to enforce those rules cleanly and consistently. The policy_scope feature is especially helpful—it restricts index or list queries to only the records the current user can see by applying scopes defined in the policy class. Pundit encourages placing authorization logic close to the model domain without muddling controllers or views, making permissions easier to reason about and testable.
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  • 14
    Pusher Channels Javascript Client

    Pusher Channels Javascript Client

    Pusher Javascript library

    Bi-directional hosted APIs that are flexible, scalable and easy to use. We create and maintain complex messaging infrastructure so you can build the realtime features your users need, fast.
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  • 15
    Pushy jQuery

    Pushy jQuery

    Pushy is a responsive off-canvas navigation menu using CSS transforms

    Pushy is a responsive off-canvas navigation menu using CSS transforms & transitions. This project was inspired by the off-canvas navigation menu seen on Medium. Pushy has been implemented on many sites, check them out! Feel free to contact me if you use Pushy in one of your websites. Pushy has been featured on the Treehouse Show and in a book.
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  • 16
    Py4J enables Python programs to dynamically access arbitrary Java objects. Methods are called as if the Java objects resided in the Python virtual machine. There is no code to generate and no interface to implement for shared objects on both sides.
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  • 17
    PyAnnotation is a Python Library to access and manipulate linguistically annotated corpus files. Supported file formats are Kura XML, Elan XML and Toolbox files. A Corpus Reader API is provided to support statistical analysis within the NLTK.
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  • 18
    PyCBC

    PyCBC

    Learn how to use PyCBC to analyze gravitational-wave data

    PyCBC is a software developed by a collaboration of LIGO, Virgo, and independent scientists. It is open source and freely available. We use PyCBC in the detection of gravitational waves from binary mergers such as GW150914. These examples explore how to analyze gravitational wave data, how we find potential signals and learn about them. Many of these tutorials will require you to make edits to config files as part of their exercises. At the moment this isn't easy to do on services like Google Colab. However, you can do them either on your local machine or by using services such as mybinder or sciserver which allow a full juypterhub experience with the ability to view and edit text files. Below we give links to the tutorials that should directly work in Google Colab, however.
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  • 19
    PyCNN

    PyCNN

    Image Processing with Cellular Neural Networks in Python

    Image Processing with Cellular Neural Networks in Python. Cellular Neural Networks (CNN) are a parallel computing paradigm that was first proposed in 1988. Cellular neural networks are similar to neural networks, with the difference that communication is allowed only between neighboring units. Image Processing is one of its applications. CNN processors were designed to perform image processing; specifically, the original application of CNN processors was to perform real-time ultra-high frame-rate (>10,000 frame/s) processing unachievable by digital processors.
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  • 20
    PyComputerAlgebra is a pure Python implementation of a computer algebra library.
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  • 21

    PyDoodles

    Assorted Mini-Modules for Python

    PyDoodles is a set of assorted "mini-modules" for the Python programming language. It's a collection of small ideas combined to create reusable code that is bound to come in handy for someone somewhere.
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  • 22
    PyLibrary

    PyLibrary

    Libraries for Python developers.

    Development in Python (be it website or an App development or implementation of an automation framework) always involves certain operations like handling db queries, operations on web, development of data structures, windows operations (handing services, registries), logging and many more... What, if you have these libraries handy with you all the time? Just import and start using them.. In comes PyLibrary.. PyLibrary is a collection of infrastructure libraries that aid faster development in Python. These libraries are well documented, provide robust error handling and are frequently updated/tested for improvements. Chetan Giridhar
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    PyMW is a Python module for parallel master-worker computing in a variety of environments. With the PyMW module, users can write a single program that scales from multicore machines to global computing platforms.
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  • 24
    PyPattyrn

    PyPattyrn

    A simple library for implementing common design patterns

    PyPattyrn is a Python package aiming to make it easier and faster to implement design patterns into your own projects. Design patterns by nature cannot be directly translated into code as they are just a description of how to solve a particular problem. However, many of the common design patterns have boilerplate code that is common throughout all implementations of the pattern. This package captures that common code and makes it easy to use so that you don't have to write it yourself in all your projects.
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  • 25

    PyProperties

    Provides support for properties files in Python 3.x

    pyproperties provides support for properties files in Python. Being written entirely from scratch it is not in any way derived from java.util.Properties. There are projects which try to mimic j.u.P. This is not one of them. It can read, parse and store properties files but also provides some more advanced functionality like manipulating comments and type-guessing.
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