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Write PHP tests with a concise test-and-expectation syntax and run them from the project command line.

A Java teaching IDE where learners program actors and see their code run inside interactive worlds.

A terminal text editor with familiar keybindings, multiple cursors, splits, and Lua plugins.

A beginner-focused BASIC IDE with instant graphics, a step debugger, and a browser-based WebAssembly edition.

A cross-platform IDE with language-aware editing, refactoring, project wizards, and application tooling.

A KDE editor for multi-file coding with split views, project navigation, search, and plugins.

A writing workspace for notes, outlines, mind maps, and AI help.

Gradual, multilingual textual programming for the classroom

Find a model by style or image and inspect its archive before spending credits

Inspect regular expressions as editable building blocks

Repair PDF tags, tables, and logical reading structure

Read and understand smart contracts with live onchain values

Build a wiki from linked pages, namespaces, and a dedicated open-source engine.

Build an opening tree from chess-game collections

Validate and convert coded measurement-unit expressions

A lightweight local Markdown knowledge base with tags, search, and a note graph.

A free self-hosted PaaS for deploying apps onto a Docker server you control.

A browser IDE for running short code samples or building supported multi-file projects across many languages.

A distraction-free Markdown editor for writing notes as readable documents.

Stage, commit, branch, rebase, and inspect a Git repository through a terminal interface.

Run Python programs and isolate project packages with the official CPython interpreter.

An embeddable persistent key-value store for applications that need fast local storage.

Summarize files, code, comments, and blank lines across a project by programming language.

List files with color, useful metadata, and Git repository status from a modern ls-style command.