Flashdevelop Alternatives (September 2025)

Visual Studio Code is a code editor redefined and optimized for building and debugging modern web and cloud applications.  Visual Studio Code is free and available on your favorite platform - Linux, macOS, and Windows.

A cross-platform IDE for C, C++, Python, QML/JavaScript and PHP

CodeLobster - Free portable cross-platform PHP IDE with support Drupal, Smarty, Twig, WordPress, Joomla, JQuery, CodeIgniter, HTML, CSS, JavaScript, TypeScript, AngularJS, CakePHP, Python, Laravel, Phalcon, Symfony, Yii

Home of the Bluefish Editor, a powerful editor targeted towards programmers and webdesigners. It supports working with local and remote files, syntax highlighting and a WYSIWYN interface.

Brackets is a lightweight, yet powerful, modern text editor. We blend visual tools into the editor so you get the right amount of help when you want it. With new features and extensions released every 3-4 weeks, it's like getting presents all year long.

Apache NetBeans

Code faster with Komodo IDE from ActiveState. Best multi-language IDE for today's web languages - Python, PHP, Perl, Golang, Ruby and more.

GDevelop is a free, fast, easy, open-source game engine. Learn 2D and 3D game development with our tutorials. Publish everywhere: iOS, Android, Steam...

Ninja-IDE is an open-source Python IDE. You will find guides on Windows, Cyber Security and Linux along with downloads for software and Apk.

Built from scratch, based on 20 years of experience developing IDEs. Fleet uses the IntelliJ code-processing engine, with a distributed IDE architecture and a reimagined UI.

Zend Studio is your proven PHP IDE, that can be used as a standalone solution or used with Zend Server as a wholly integrated solution.

The IDE with all the features you need, having a consistent look, feel and operation across platforms.

Explore the PhpStorm IDE for web projects. Get everything you need for PHP, JavaScript, and SQL coding out of the box

UltraEdit is a secure, powerful, highly configurable text editor and hex editor for Windows/Mac/Linux. Helpful find, compare, and FTP integrations. Free trial

Save time by deploying a development environment in seconds. Collaborate, code, learn, build, and run your projects directly from your browser.

JCppEdit – Best IDE for Beginners to code many programs under a single environment starting from C, C++, Java to HTML, CSS, JavaScript and XML.

Make development more productive and enjoyable with WebStorm, the IDE for JavaScript and related technologies.

Full-featured Python IDE with editor, debugger, unit testing, error checking, refactoring, and much more. Designed for Python, for a more productive development experience.

Build, share, and learn JavaScript, CSS, and HTML with our online code editor.

A powerful IDE from JetBrains helps you develop in C and C++ on Linux, macOS and Windows.

EditPlus is a text editor for Windows with built-in FTP, FTPS and sftp capabilities. While it can serve as a good Notepad replacement, it also offers many powerful features for Web page authors and programmers.

PhpED - PHP IDE integrated development environment for developing web sites using PHP, HTML, Perl, JScript and CSS that combines a comfortable editor, debugger, profiler with the MySQl, PostrgeSQL database support based on easy wizards and tutorials.Easy to use for debugging PHP scripts, publishing projects to remote servers through FTP, WebDAV, CVS. It is suitable for multiple developers and very large projects. Working with SOAP servers.

Froala's WYSIWYG Editor is a beautiful JavaScript web editor that's easy to integrate for developers and your users will fall in love with its clean design.

Source Insight is a programming editor & code browser with built-in live analysis for C/C++, C#, Java, and more; helping you understand large projects.

Website for Spyder, the Scientific Python Development Environment

Cross-platform Ruby on Rails IDE with first-class support for Ruby-related technologies. Download now!

The free, multiplatform, feature-rich screenwriting program!

Open-source electronic prototyping platform enabling users to create interactive electronic objects.

A professional visual editor for CSS Grid, Bootstrap, Tailwind CSS, responsive design, HTML, and CSS. Convert HTML to WordPress themes.

Sublime Text is a sophisticated text editor for code, markup and prose. You'll love the slick user interface, extraordinary features and amazing performance.

The Python IDE for data science and web development with intelligent code completion, on-the-fly error checking, quick-fixes, and much more.

The Welkin Suite is a new Force.com IDE providing powerful features for increased development productivity and comfort. Start using it today for free!

Adobe ColdFusion Builder software is the only professional IDE that allows you to build and deploy web and mobile applications.

EditPad Lite: A fine text editor with all the necessary basic features. Free for non-commercial use. An ideal replacement for Notepad.

Develop great software in secure behind-the-firewall environments. World's best firms use RhodeCode to unify repository management. Free and open source.

Maqetta - Visual authoring of HTML5 user interfaces - in the browser

Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel.

Develop .NET, ASP.NET, .NET Core, Xamarin or Unity applications on Windows, Mac, Linux

Oracle JDeveloper is a free integrated development environment that simplifies the development of Java EE-based composite applications and provides a complete end-to-end development for Oracle

Rock-solid, Free WYSIWYG Editor with Collaborative Editing, 200+ features, Full Documentation and Support. Trusted by 20k+ companies.

Greenshot allows you to make and to edit screenshots simply. The application allows to ‘capture’ window, a portion of the screen or the entire screen.

HTML Editor, CSS Editor, Quick start from Templates. The HTML Editor from CoffeeCup Software has it all! And with free support it is the default choice.

TYPO3 is a free enterprise-class CMS based on PHP. It combines open source code with reliability and true scalability. This is the official project website.

The Eclipse Foundation - home to a global community, the Eclipse IDE, Jakarta EE and over 415 open source projects, including runtimes, tools and frameworks.

The complete Go IDE

https://www.eclipse.org/che/

XMLSpy XML Editor is an advanced, time-saving tool for editing XML, JSON, and related technologies. See why it’s the choice of over 5 million developers with a free, 30-day trial.

Open source software which you can use to easily create a beautiful website, blog, or app.

It’s a versatile text editor, a popular Notepad replacement, and a blazingly fast HTML editor. NoteTab gets more done in less time. Try it!

FileZilla - The free FTP solution for both client and server. Filezilla is open source software distributed free of charge.

Oxygen XML Editor is a cross platform tool setting the standard in XML editing. This advanced XML editor provides the most intuitive tools for XML editing, authoring, and development. It is the preferred choice for users looking for an XML Editor for Windows, Mac, and Linux.

Millions of devs and teams choose GitKraken Desktop to make Git more visual, accessible and collaborative. Download to use for free and to start a team trial.

ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to many supported destinations you can choose from.

Open source record and playback test automation for the web

Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.

GitLens is an open-source extension for Visual Studio Code.

TinyMCE is the most advanced WYSIWYG HTML editor designed to simplify website content creation. The rich text editing platform that helped launched Atlassian, Medium, Evernote and more.

The Jupyter Notebook is a web-based interactive computing platform. The notebook combines live code, equations, narrative text, visualizations, interactive dashboards and other media.

Quickly create and publish web pages almost anywhere with Adobe Dreamweaver responsive web design software that supports HTML, CSS, JavaScript, and more.

UltraFTP: Secure 64-bit FTP client with seamless UltraEdit integration. Enjoy fast, user-friendly transfers with full theme and session support across FTP, SFTP, and FTPS.

MyEclipse is the best Java IDE for the enterprise with the latest tools and technologies. A free 30 day trial lets you explore this powerful, full-featured IDE for development with Java EE, Spring, Maven, WebSphere, and more.

Joomla! is the mobile-ready and user-friendly way to build your website. Choose from thousands of features and designs. Joomla! is free and open source.

VLC: Official site - Free multimedia solutions for all OS!

Tabby is a free and open source SSH, local and Telnet terminal with everything you'll ever need.

The Freedom to Create

DHTMLX UI libraries are pure JavaScript/HTML5 client-side widgets for high-speed web and mobile development. They are easily customizable and configurable via API.

Xplorer, an easy-to-use, customizable, modern file manager.

Espresso is the web editor for Mac, more productive than caffeine.

HelpNDoc is one of the most popular and easy to use Help Authoring Tool (HAT). It can generate various documentation formats from a single source: CHM, Responsive HTML, Word DocX, PDF, ePub and Kindle Ebooks, and Markdown files. And it is Free for personal use.

A stand-alone browser and devtool that helps you build better sites in less time. All the tools you need in one app.

Visual Assist for Visual Studio is a productivity tool for refactoring, reading, writing, navigating and generating C/C++/C# code. Try it for free.

FreeShow is a free and open-source presenter software for anyone to use with ease.

Doc-O-Matic is a software source code documentation and Help authoring tool. It takes source code and comments, adds conceptual topics and external input and produces documentation from it. With its single-source approach it generates many different kinds of output from a single documentation base.

SCons: A software construction tool

Open source EDA / electronics CAD software for Windows, macOS and Linux. Use schematic capture, create PCB designs and view them in 3D, all forever free.

Drupal is an open source platform for building amazing digital experiences. It's made by a dedicated community. Anyone can use it, and it will always be free.

File Viewer Lite is a free file viewer for Windows that allows you to open and view over 150 different file types.

Zen Cart

Codeium offers best in class AI code completion, search, and chat — all for free. It supports over 70+ languages and integrates with your favorite IDEs, with lightning fast speeds and state-of-the-art suggestion quality.

Concrete CMS is an open source content management system for teams. A website builder with built in tools make editing content easy.

PerceptPixel: Advanced Image CDN offering real-time image transformation, automatic optimization, and fast loading images globally. Ideal for developers needing seamless integration and robust image handling with features like background removal, WebP conversion, and custom CDN solutions. Enhance your site's speed and SEO with our developer-friendly image API. With it's easy to use online image editor now remove and replace image backgrounds with just a click

Welcome to the home of SmartFTP, the most popular FTP client for Windows.

Build your website faster and easier with ready made code snippets made with Bootstrap, Tailwind CSS, Vue.js, html, css, Javascript,Jquery.

Flutter transforms the entire app development process. Build, test, and deploy beautiful mobile, web, desktop, and embedded apps from a single codebase.

TortoiseHg Official Website.

Discover UltraCompare, the ultimate tool for file and folder comparison. Compare PDFs, Word, Excel files, sync folders, and more.

The #1 ranked medical coding software. Provides lightning fast ICD-9-CM, CPT, and HCPCS code searches, PLUS: Unbundling edits, Medical Necessity codes, RBRVS, DME, and LAB fee schedules. Developed by Medical Coding and Compliance Solutions, LLC (MCCS), A Division of Practice Management Information Corporation (PMIC).

WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.

Apache ServiceMix - An open-source integration container

OpenFOAM is the leading free, open source software for computational fluid dynamics (CFD), owned by the OpenFOAM Foundation and distributed exclusively open source under the General Public...

Empower your UI/UX design team with top prototyping solutions. Create interactive web or app wireframes and prototypes without any coding skills.

Robo 3T (formerly Robomongo) is the free, lightweight, open-source MongoDB GUI with an embedded mongo shell, real auto-completion, and support for MongoDB 4.0.

The only free, fully open source and self-hosted WordPress plugin for maintaining multiple sites from one location.

Download free website builder software! It's free, easy & no-code! 10000+ templates. Generate with AI

H5P empowers everyone to create, share and reuse interactive content - all you need is a web browser and a web site that supports H5P.

.NET is a free, cross-platform, open-source developer platform. .NET has languages, editors, and libraries to build for web, mobile, desktop, games, and IoT.

A Git GUI that offers a visual representation of your repositories. Sourcetree is a free Git client for Windows and Mac.

Create your website and grow with confidence. From an intuitive website builder to advanced business solutions & powerful SEO tools—Try Wix for free.

TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.