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Developer Tools, APIs & Open-Source Platforms

Free developer tools, APIs, code editors, testing platforms, and open-source software for modern app development.

Code Editors (20)

  • Visual Studio Code - Popular lightweight code editor with extensions, debugging, and Git support.
  • Atom - Open-source hackable text editor (now archived but still widely referenced).
  • Sublime Text - Fast, minimal, and powerful text editor for developers.
  • Vim - Highly configurable terminal-based text editor for power users.
  • Neovim - Modern fork of Vim with better plugins and performance.
  • Notepad++ - Free Windows text and source code editor.
  • Brackets - Open-source code editor focused on web development.
  • WebStorm - Professional JavaScript IDE with smart coding assistance.
  • PyCharm - Python IDE with advanced debugging and testing tools.
  • IntelliJ IDEA - Powerful Java and multi-language IDE.
  • Eclipse - Open-source IDE for Java, C/C++, and more.
  • NetBeans - Apache IDE for Java, PHP, and web apps.
  • Kate - Advanced text editor for Linux and cross-platform users.
  • Geany - Lightweight IDE with built-in terminal and plugins.
  • Micro - Modern terminal-based editor with mouse support.
  • Lite XL - Lightweight, extensible code editor written in Lua.
  • Zed - High-performance collaborative code editor.
  • Code::Blocks - Open-source C, C++ and Fortran IDE.
  • Komodo Edit - Multi-language code editor with debugging support.
  • Emacs - Extensible, customizable text editor and development environment.

API Platforms (34)

  • Postman - End-to-end platform for designing, testing, and collaborating on APIs.
  • RapidAPI - Global API marketplace to discover, test, and connect APIs quickly.
  • Swagger - Open-source toolkit for API design, documentation, and testing.
  • Apigee - Enterprise API management platform with analytics and security controls.
  • Insomnia - Open-source REST and GraphQL API testing client.
  • Hoppscotch - Lightweight open-source API testing tool for web and desktop.
  • HTTPie - Command-line and web-based API client for testing and debugging.
  • Stoplight - API design, documentation, and governance platform.
  • Kong - Open-source API gateway and service connectivity platform.
  • Tyk - Open-source API gateway and management system.
  • WSO2 API Manager - Open-source API management and integration platform.
  • Gravitee - Open-source API management and gateway solution.
  • API Umbrella - Open-source API management for rate limiting and analytics.
  • DreamFactory - Instant REST API generation platform for databases.
  • Hasura - Instant GraphQL APIs over databases with real-time subscriptions.
  • Supabase - Open-source Firebase alternative with auto-generated APIs.
  • Firebase Functions - Serverless backend APIs for mobile and web apps.
  • Mockoon - Open-source API mocking and testing platform.
  • Beeceptor - Mock API and request inspection service for developers.
  • RequestBin - HTTP request testing and webhook inspection tool.
  • Apiary - API design, documentation, and mock server platform.
  • Redocly - OpenAPI documentation generator and API governance tool.
  • Back4App - Backend-as-a-service with REST and GraphQL APIs.
  • Nhost - Open-source backend platform with GraphQL APIs.
  • PostgREST - Turns PostgreSQL into a RESTful API automatically.
  • FastAPI - High-performance Python framework for building APIs.
  • LoopBack - Node.js framework for building REST APIs quickly.
  • Strapi - Open-source headless CMS with REST and GraphQL APIs.
  • Directus - Instant APIs for SQL databases with admin UI.
  • PocketBase - Lightweight backend with real-time REST APIs.
  • OpenAPI Generator - Generates client SDKs and server stubs from OpenAPI specs.
  • Azure API Management - API gateway and lifecycle management service from Microsoft.
  • AWS API Gateway - Fully managed service for creating and securing APIs.
  • Mashape - Legacy API marketplace that evolved into RapidAPI.

Testing & QA Tools (21)

  • Selenium - Automated browser testing framework for web apps.
  • Jest - JavaScript testing framework for unit and integration tests.
  • Cypress - End-to-end testing tool for modern web applications.
  • Postman Monitor - Automated API performance, uptime, and health checks.
  • Playwright - Fast cross-browser end-to-end testing framework.
  • Mocha - Flexible JavaScript test framework for Node.js and browsers.
  • Chai - Assertion library for JavaScript testing.
  • JUnit - Unit testing framework for Java applications.
  • TestNG - Testing framework inspired by JUnit and NUnit.
  • PyTest - Powerful Python testing framework with simple syntax.
  • Robot Framework - Keyword-driven automation framework for acceptance testing.
  • Katalon - All-in-one test automation platform for web, API, and mobile.
  • Appium - Open-source mobile app automation tool.
  • SoapUI - API functional, security, and load testing tool.
  • JMeter - Performance and load testing for web applications.
  • Locust - Python-based load testing tool.
  • Gauge - Lightweight test automation framework by ThoughtWorks.
  • BrowserStack - Cross-browser and device testing in the cloud.
  • LambdaTest - Cloud-based cross-browser testing platform.
  • Percy - Visual regression testing for web apps.
  • TestRail - Test case management and QA tracking platform.