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Overlay and edit animated or still images

Design OpenAPI descriptions, create API documentation and validate designs in a visual workspace.

Render technical Markdown and notebooks into reports, books, slides, and websites.

A PDF editor separate from PDFCreator's print workflow

An extensible IDE for Ada and SPARK projects, with integrated editing, build, navigation, and debugging tools.

A Scratch-derived block-programming editor with a compiled runtime and JavaScript extension support.

Connect flat packaging artwork with folded mockups and proof exports.

A local-first Markdown notebook and knowledge base with backlinks and optional AI writing.

Build store screenshots with device frames, captions and panoramic backgrounds.

Edit SVGs and build custom icon packs, sprites and fonts.

Edit Markdown notes and todo.txt lists in a lightweight Android text editor.

Format and lint web-project files with a shared command-line toolchain.

A free, open-source Markdown editor for research notes and long-form writing.

Edit Python modules in a desktop window, run them in an interactive shell, and debug them with built-in tools.

A Mac editor for drawing and developing typefaces.

A fantasy console with a compact Lua coding environment and built-in sprite, map, sound, and music editors.

Open a Git repository in a browser IDE backed by a Kubernetes development workspace.

Edit, validate, transform, and publish XML in text and visual authoring modes.

Edit code on macOS with project search, multiple carets, bundles, and version-control actions.

A browser-based font editor backed by a local or remote server.

A source editor for LilyPond scores with music view, MIDI playback and score-building tools.

Design mobile app screens in a browser and program their behavior by assembling visual blocks.

Drop a screenshot onto a device photograph and download the preview.

Use a Git repository as a wiki that can be edited in a browser or a text editor.