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Find the best open-source alternatives

Discover community-driven replacements for popular proprietary software.

Popular searchesPostmanWordPressEvernoteNumPy

Popular products

Most searched proprietary tools with open-source replacements

Hoppscotch
Postman31 alts

An open-source API development ecosystem for testing HTTP, WebSocket, GraphQL, and other APIs with real-time collaboration.

TypeScript80.2k
Official examples
WordPress22 alts

An open-source, fullstack Next.js framework that provides a TypeScript backend and admin panel, usable as a headless CMS or for building applications.

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Evernote21 alts

A privacy-focused, open-source note-taking app with end-to-end encrypted sync across all major platforms.

TypeScript56.3k
stdlib
NumPy20 alts

A standard library for JavaScript and TypeScript with an emphasis on numerical and scientific computation.

JavaScript6.0k

Browse all

Showing 2,872 products with open-source alternatives

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snitch
Boost.UT1 alts

A lightweight C++20 testing framework focused on minimal heap allocation and fast compilation.

C++317
tempo
date-fns1 alts

A lightweight JavaScript/TypeScript library for parsing, formatting, manipulating, and internationalizing dates using native Date objects.

TypeScript2.6k
EaselJS
Adobe Animate1 alts

A JavaScript library for building high-performance interactive 2D graphics and animations on the HTML5 Canvas.

JavaScript8.2k
JavaCPP
JNA1 alts

A Java library providing efficient, zero-overhead access to native C++ code using JNI and annotations.

Java4.7k
bespoke.js
Impress.js1 alts

A super minimal, modular presentation micro-framework for modern browsers with a rich plugin ecosystem.

JavaScript4.8k
OpenBudgeteer
YNAB1 alts

A self-hosted budgeting application based on the Bucket Budgeting Principle, inspired by YNAB and Buckets.

C#971
go-etl
DataX1 alts

A Go-based toolset for data extraction, transformation, and loading, providing powerful data synchronization capabilities.

Go192
Riptide
Feign1 alts

A next-generation HTTP client for Spring that implements client-side response routing, embracing HTTP's full power.

Java341
Hashstation
Hashtopolis1 alts

A BOINC-based distributed password cracking system with a modern web interface for cybersecurity professionals.

C11
Artipie
Artifactory1 alts

An open-source, horizontally scalable binary artifact management tool supporting Maven, Docker, npm, and more.

Java689
libharu
iText (proprietary version)1 alts

A free, cross-platform C library for generating PDF files with support for text, images, fonts, encryption, and CJK encoding.

C2.0k
pci-blackbox
Spreedly1 alts

A PCI-DSS compliant card data handling system built on PostgreSQL and PL/pgSQL for secure payment processing.

Perl5
Flintrock
Amazon EMR1 alts

A command-line tool for launching Apache Spark clusters on AWS EC2 with fast, configurable deployments.

Python650
Delight
Spark UI1 alts

A free, open-source alternative to Spark UI and Spark History Server with enhanced CPU and memory metrics visualizations.

Scala344
uv
twine1 alts

An extremely fast Python package and project manager written in Rust, replacing multiple existing tools.

Rust89.2k
Psake
MSBuild1 alts

A PowerShell-based build automation tool that leverages existing command-line knowledge with a syntax inspired by rake.

PowerShell1.6k
Cosmos Journeyer
No Man's Sky1 alts

A browser-based space exploration game featuring procedurally generated, infinite star systems with seamless planetary travel.

TypeScript50
rolldown
esbuild1 alts

A fast Rust-based JavaScript/TypeScript bundler with Rollup-compatible API, intended for Vite's future bundler.

Rust13.9k
Flexi
Foundation1 alts

A responsive layout framework for Ember.js focused on performance and maintainability with minimal runtime overhead.

JavaScript217
Web Audio Extension
Firefox DevTools Web Audio Editor1 alts

A Chrome DevTools extension for visualizing and interacting with Web Audio API routing graphs.

JavaScript194
Falcon
Puma1 alts

A high-performance, multi-process, multi-fiber Rack-compatible web server for Ruby with native HTTP/1, HTTP/2, and TLS support.

Ruby3.0k
rsx
react-native-cli1 alts

A CLI tool designed to simplify daily React Native development tasks and eventually replace the react-native CLI.

JavaScript30
Security Code Scan
Veracode1 alts

A static code analyzer that detects security vulnerabilities in C# and VB.NET applications.

C#976
Expressa
deployd1 alts

Data-driven API middleware for Node.js/Express with an admin interface for creating REST endpoints from JSON schemas.

JavaScript452
danet
Nest.js1 alts

A mature, efficient backend framework for Deno, inspired by Nest.js, for building scalable HTTP/WebSocket servers and KVQueue workers.

HTML527
areg-sdk
DDS1 alts

A C++ middleware and framework for building distributed service-oriented systems with automated threading, IPC, and location-transparent Object RPC.

C++362
flowplayer
Video.js (commercial features)1 alts

An open-source HTML5 video player with Flash fallback for web developers.

JavaScript1.9k
Pipedream
Make (Integromat)1 alts

A free, hosted integration platform for developers to connect APIs and build event-driven automations with 1000+ pre-built apps.

JavaScript11.7k
MiddleDrag
Middle1 alts

Adds three-finger trackpad gestures for middle-click and middle-drag on macOS, providing the missing middle mouse button.

Swift230
dispenso
Intel TBB1 alts

A high-performance C++ thread pool and parallel algorithms library for compute-bound workloads, designed as a sanitizer-clean alternative to OpenMP and TBB.

C++291
Yamtrack
MyAnimeList1 alts

A self-hosted media tracker for movies, TV shows, anime, manga, video games, books, comics, and board games.

Python3.5k
Runtime
browserbase1 alts

A deterministic, skills-based browser agent that automates web interactions using predefined action recipes for popular sites.

TypeScript203
Pagy
WillPaginate1 alts

A fast, lightweight, and agnostic pagination gem for Ruby applications with multiple pagination techniques and frontend helpers.

Ruby5.0k
ruff
Black1 alts

An extremely fast Python linter and code formatter written in Rust, offering drop-in replacements for tools like Flake8 and Black.

Rust49.4k
Neon
AWS Aurora1 alts

A curated list of starters, examples, guides, and resources for the Neon serverless Postgres database.

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vmn
bump2version1 alts

Automatic version management and state recovery tool that works with any language and stores versions in git tags.

Python65
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