Find the best open-source alternatives

A simple, secure, and fast identity management platform for self-hosted authentication, supporting OAuth2, LDAP, RADIUS, and Unix integration.

A fast, cross-platform build tool and task runner inspired by Make, designed for modern development workflows.

A web-based open-source bug tracking system for software development teams.

A self-hosted web app to manage your Two-Factor Authentication (2FA) accounts and generate security codes.

A composable framework for building advanced web applications with React, Vue, or Solid, offering flexibility and stability.

A MelonJS-based open-source clone of the popular Flappy Bird game, playable online and customizable.

A PostgreSQL proxy written in Rust that provides connection pooling, load balancing, and database sharding.

A fast, reliable asset pipeline for browser applications, supporting constant-time rebuilds and compact build definitions.

A durable Datalog database with Datomic-compatible APIs, immutable snapshots, and distributed architecture.

An open-source SDK for logging, storing, querying, and visualizing multimodal, time-series data like images, point clouds, and tensors.

An open-source IaC orchestration tool that runs Terraform/OpenTofu directly in your existing CI pipeline.

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

An open source trusted cloud native registry that stores, signs, and scans container images and Helm charts.

A simple OIDC provider that enables passkey-only authentication for self-hosted services.

A simple ActiveRecord mixin for soft-deleting records by flagging them as discarded, without overriding ActiveRecord methods.

A naive linter for English prose that helps developers improve their writing by detecting common style issues.

An open-source Zigbee to MQTT bridge that lets you control Zigbee devices without proprietary vendor gateways.

A composable, all-in-one mail server that implements SMTP, IMAP, DKIM, SPF, DMARC, and more in a single daemon.

A TypeScript ORM for Node.js based on Data Mapper, Unit of Work, and Identity Map patterns, supporting multiple SQL and NoSQL databases.

A free, fully-featured Microsoft OneDrive client for Linux and FreeBSD with support for Personal, Business, SharePoint, and national cloud deployments.

An all-language AI-powered code completion backend that provides intelligent autocompletions across multiple editors.

A Java HTTP client binder that simplifies writing declarative HTTP API clients using annotations.

Chat with your PDF files using GPT with a simple, accurate RAG architecture that avoids third-party dependencies.

An open-source, self-hosted ML experiment tracker with a performant UI and SDK for comparing and querying training runs.

A powerful, interactive JavaScript charting and data visualization library for the browser.

A lightweight, readable, and automated internationalization (i18n) framework for JavaScript and React applications.

A durable execution platform for building scalable, reliable applications with automatic failure handling.

A general-purpose literate programming engine for dynamic report generation in R, designed to give users full control over output.

An open-source macOS app for elegant window management with a customizable radial menu and keyboard shortcuts.

An open-source API for metering and usage-based billing, supporting hybrid pricing models and self-hosting.

Lima launches Linux virtual machines with automatic file sharing and port forwarding, focusing on running containers on macOS and other hosts.

An open-source machine learning framework for building classical, deep, or hybrid ML applications with a focus on performance and portability.

An open-source Go engine that replicates AlphaGo Zero's architecture, learning solely through self-play without human knowledge.

A Windows desktop tool for connecting to and administering Azure Service Bus messaging entities with advanced testing and management features.

A .NET library for automated UI testing of Windows applications using Microsoft's UI Automation framework.

An open-source macOS app for elegant window management with a customizable radial menu and keyboard shortcuts.