A
Apache Arrow
A cross-language development platform for in-memory data.
DataMulti-language
Editor’s Pick
Lodash
A modern JavaScript utility library delivering modularity, performance & extras.
Lodash makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc. Its modular methods are great for iterating arrays, objects, and strings; manipulating and testing values; and creating composite functions. It is a successor to Underscore.js with improved performance and additional features like lazy evaluation and FP variants.
NumPy
The fundamental package for scientific computing with Python.
NumPy is the foundational library for numerical computing in Python. It provides a high-performance multidimensional array object (ndarray) and tools for working with these arrays. NumPy arrays enable vectorized operations that execute at near-C speed, making Python viable for scientific computing. It serves as the backbone for Pandas, SciPy, scikit-learn, and virtually all scientific Python libraries.
Tailwind CSS
A utility-first CSS framework for rapidly building custom designs.
Tailwind CSS is a highly customizable, low-level CSS framework that gives you all the building blocks you need to build bespoke designs without fighting to override opinionated styles. Instead of pre-designed components, Tailwind provides utility classes that let you compose designs directly in your markup. Its Just-in-Time engine generates only the CSS you use, resulting in minimal production stylesheets.
Data Processing
View All →Transform, analyze, and manipulate structured data at scale.
Graphics & Visualization
View All →Render 3D scenes, data visualizations, and interactive graphics.
B
Babylon.js
Powerful, beautiful, simple, open — a complete 3D engine for the web.
GraphicsJS/TS
C
Chart.js
Simple yet flexible JavaScript charting library for designers and developers.
GraphicsJS/TS
D3.js
Data-Driven Documents for interactive data visualization.
GraphicsJavaScript
Matplotlib
Comprehensive 2D & 3D plotting for Python publication-quality figures.
GraphicsPython
HTTP Clients
View All →Call APIs, handle requests, and manage network communication.
Axios
Promise based HTTP client for the browser and node.js.
HTTPJavaScript
H
HTTPX
A next-generation HTTP client for Python with async support and HTTP/2.
HTTPPython
O
OkHttp
HTTP is the way modern applications network. It's how we exchange data and media.
HTTPJava/Kotlin
Requests
HTTP for Humans — elegant and simple HTTP library for Python.
HTTPPython
Real-time Communication
View All →Enable bidirectional, low-latency messaging between clients and servers.
A
Ably
Real-time messaging infrastructure at internet scale.
Real-timeJavaScript
C
Centrifugo
Language-agnostic scalable real-time messaging server.
Real-timeGo
M
Mercure
Real-time made easy — a protocol for pushing updates to browsers.
Real-timeGo
P
Pusher
Hosted real-time messaging and push notifications.
Real-timeJavaScript
State Management
View All →Control application state predictably across components.
Styling & CSS
View All →Design systems and utility-first approaches for UI styling.
Bootstrap
The most popular HTML, CSS, and JavaScript framework for responsive, mobile-first projects.
StylingCSS
C
Chakra UI
Simple, modular and accessible component library for React.
StylingJS/TS
M
MUI (Material UI)
Ready-to-use foundational React components, free forever.
StylingJS/TS
S
Sass
CSS with superpowers — the most mature, stable, and powerful professional grade CSS extension.
StylingCSS
Testing & Quality
View All →Write, run, and automate tests to ship with confidence.
JUnit
The programmer-friendly testing framework for Java and the JVM.
TestingJava
Jest
Delightful JavaScript Testing Framework with a focus on simplicity.
TestingJavaScript
M
Mocha
Simple, flexible, fun — JavaScript test framework running on Node.js and browser.
TestingJS/TS
Mockito
Tasty mocking framework for unit tests in Java.
TestingJava
Utility Libraries
View All →General-purpose helpers that fill gaps in the standard library.
Boost
Free peer-reviewed portable C++ source libraries.
UtilityC++
Guava
Google Core Libraries for Java — collections, caching, primitives, and more.
UtilityJava
Lodash
A modern JavaScript utility library delivering modularity, performance & extras.
UtilityJavaScript
R
RxJS
Reactive Extensions Library for JavaScript — compose async and event-based programs.
UtilityJS/TS