Open Props
CSS custom properties for consistent design tokens
1048 tools in our directory are listed as open source, from 30 sections: Frameworks (89), Open Source (82), UI & Components (80), Dev Utilities (55) and 26 more sections.

CSS custom properties for consistent design tokens

Free guides on starting, growing and maintaining open source projects

Free weather forecast and historical weather API with no API key

Lightweight Python SDK for agents, handoffs and guardrails

Open standard for describing HTTP APIs in a machine-readable way

Generates API clients, server stubs and docs from OpenAPI

Open source fork of HashiCorp Vault for managing secrets

Open-source coding agent for the terminal, desktop and phone

Open source tool for real-time Kubernetes and cloud cost allocation

Fast source code search and cross reference engine for large trees


Open source metadata platform for cataloging, quality and lineage

Open source usage metering and billing for APIs and AI products

Open source emoji set with colored and outlined styles

Open source platform for building private and AI clouds

Open source logs, metrics and traces with columnar Parquet storage

Open source web and product analytics, a Mixpanel alternative

Open source project management with Gantt charts and agile boards

Free open source tool for cleaning and transforming messy data

Open source session replay and product analytics you can self-host

Open source search and analytics suite under Apache 2.0

Open source software for building private and public clouds

Open source status page, uptime monitoring and incident response

Open standard and tools for collecting traces, metrics and logs

Open source infrastructure as code, a Terraform-compatible tool



Open source identity and access management for apps and APIs

Ask questions about your computers using SQL queries

Finds known vulnerabilities in your project's dependencies


Open source dashboard for editing Markdown and MDX in GitHub

Short security guides for developers, one topic per sheet

Go-based open source web application firewall with CRS support

Deliberately insecure web app for security training and CTFs

Self-hosted live streaming server with built-in chat

Open source accessibility testing tools for the command line and CI

Consumer-driven contract testing for APIs, web apps and microservices

Static site search library that keeps bandwidth low on large sites

Free open source CMS that edits content in a GitHub repository


Converts documents between Markdown, Word, LaTeX and other formats

Fast, scalable build system for large multi-language codebases


Open source backend server for mobile and web apps


Open source headless CMS and app framework built with TypeScript.

Free, federated video hosting platform you can run yourself
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