Find the best open-source alternatives

A fast, modern Inversion of Control (IoC) container and successor to StructureMap for .NET applications.

A lightweight, fast embedded JavaScript template engine for Node.js, Deno, and the browser, written in TypeScript.

A distributed, multi-tenant gateway providing serverless SQL on data warehouses and lakehouses.

A CPU and memory-efficient wide-spectrum content blocker for Chromium and Firefox, blocking ads, trackers, and malware.

An open-source, self-hostable note-taking and knowledge management platform with markdown, Vim/Emacs modes, and blogging features.

Alfred 2 workflow for searching and executing menu bar items and Keyboard Maestro hotkeys.

An open-source hybrid integration platform for connecting applications, data, and systems with enterprise-grade features.

A hyperparameter-free gradient boosting machine with a simple budget parameter, built for high performance with Rust and bindings for Python and R.

A feature-rich Select2 component for Angular applications with extensive customization and accessibility support.

A Neovim plugin for tagging and quickly navigating to important files with persistent cursor positions and project scopes.

A transparent SSH, HTTPS, Kubernetes, MySQL, and PostgreSQL bastion host with built-in session recording and no client-side software required.

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

An IRC server that lets you connect to your Slack teams with your IRC client, serving as a replacement for Slack's discontinued IRC gateway.

A cloud-native PostgreSQL WAL receiver for zero-data-loss streaming, compression, encryption, and remote archiving.

A Docker image for running Android emulators with noVNC support, video recording, and integration for development and testing.

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

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

An open-source, privacy-first experience management platform for creating and deploying in-app, website, link, and email surveys.

OWASP's software composition analysis tool that identifies project dependencies and checks for known vulnerabilities.

An open-source media distribution framework for publishing public or subscription-based content, built on Django and Wagtail.

A free open-source Ruby on Rails scoring server for cyber Capture the Flag competitions with dynamic hints and web-based challenge management.

A local-first API client and HTTP interceptor for building, testing, and mocking APIs directly in your browser or desktop.

A Node.js server and web client for creating synchronized video-watching channels with integrated chat.

An open-source Node.js implementation of the ArcGIS GeoServices REST API specification for serving geographic data.

A self-hosted server for sending push notifications via Matrix, compatible with Gotify's API.

A library for building high-performance custom human pose estimation applications with real-time inference and flexible model development.

An online mind mapping editor with native-like interaction, cloud sync, and instant sharing capabilities.

A modular, low-resource network honeypot that mimics services to detect breaches and alert on attacker interactions.

Build interactive web visualizations with Python without HTML/JS knowledge, inspired by R's Shiny package.

A private, self-hosted Terraform/OpenTofu registry for modules and providers with a web dashboard and RBAC.

A fast, lightweight terminal user interface for managing Docker and Podman containers and Compose projects.

A Clojure/ClojureScript library that automatically generates project schedules from task descriptions with constraints like resources, duration, and dependencies.

Sento is an actor framework for Common Lisp featuring actors, agents, FSMs, and an event stream for building reactive, concurrent systems.

A Vue 3 library providing TypeScript decorators for writing Vue components as ES classes.

An open-source platform for declarative deployment of containerized web apps, on a single node or Kubernetes, with built-in auth and RBAC.

A framework for building reactive, real-time frontend UI components in Amber applications using pure Crystal.