MIT App Inventor
appinventor.mit.eduDesign mobile app screens in a browser and program their behavior by assembling visual blocks.
Design mobile app screens in a browser and program their behavior by assembling visual blocks.
Edit, validate, transform, and debug XML and JSON in Altova's desktop development environment.
A desktop HTML and CSS editor that keeps the rendered page and source code in sync.
A cross-device Markdown editor with a free writing core and an optional lifetime Pro upgrade.
A terminal-native editor built around multiple selections, syntax-aware navigation, and language-server features.
A lightweight cross-platform editor/IDE with configurable compile, build, and run commands.
Hand-drawn characters assembled from reusable vector parts
Jan Kovařík’s themed icon catalog with one-time licensing.
Memory and continual learning engine for AI agents
Managed AI search widget that crawls your site and returns answers with sources.
Arrange and animate device scenes in a browser-based 3D editor.
A layered icon editor with image, 3D-model and component-based workflows.
A browser IDE for programming courses, with Linux project environments and an integrated terminal.
Open-source browser SVG editing with an extensible canvas
A lightweight programmer's editor for website files, scripts, and source code.
Edit code, run project tasks, debug, use Git, and preview web work in a Mac-native IDE.
Choose a file-focused editor or add project-wide build and debug tools.
Mix-and-match vector people for illustrated scenes
A local Markdown editor for people who want rich text and source files in their own folders.
Pixel art and sprite animation in a free browser editor
Shape a text editor into a personal development environment using Emacs Lisp and an extension package system.
Browser-based AI photo editor with 30+ tools for cleanup, restore, upscale, and generation.
Turn JSON, YAML, XML, CSV, JSON Schema and Mermaid into diagrams you can read.
A browser-based Dart and Flutter workbench for running small programs and UI samples.