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KDevelop is a cross-platform integrated development environment for C, C++, Python, QML/JavaScript and PHP. It parses projects to provide code completion, supports multiple projects in one session, and offers a Git plugin and documentation integration. It is available for Linux, Windows and macOS.
Kenney offers thousands of completely free game assets for use in projects. The site also provides free and open source Starter Kits covering various game genres that help with starting game development.
Keploy is an open-source AI-powered API and unit testing tool for developers. It builds a digital twin of production behavior using real API traffic, mocks, and dependencies to verify AI- or human-written code changes in continuous integration pipelines before deployment, and requires no code changes to implement.
Kiln AI is a platform and open-source library for building, evaluating, and optimizing AI systems. It offers tools for working with retrieval-augmented generation, AI agents, synthetic data, model fine-tuning, and prompt optimization, with a free downloadable application available for macOS, Windows, and Linux.
Kilo is an open source AI coding agent for VS Code, JetBrains, CLI, desktop and cloud. It offers access to 500+ models at zero markup, bring-your-own keys, or local models for privacy. Kilo Gateway provides a unified API to access AI models through a single endpoint.
AI coding assistant offering line-of-code completions and documentation.
Kombai is an AI design engineer that designs websites and product UIs and ships production-ready frontend code. It offers a browser tool for editing rendered UI and sending browser context to prompts, reuse of components, tokens and hooks from repos, npm and Storybook, and a choice of 50+ models.
Langfuse is an open source platform for tracing, evaluating and improving AI agents. It connects tracing, monitoring, datasets, experiments and evaluation in one continuous loop, capturing every LLM call, tool invocation and retrieval step. The platform includes prompt management, a playground, experiments and human annotation, and works with any language or framework supporting OpenTelemetry instrumentation.
Lapce is a modern open source code editor written in Rust, featuring a native GUI with GPU acceleration in Floem. It offers remote development, built-in LSP support with Tree-sitter syntax highlighting, Vim-like modal editing and a WASI plugin system for writing plugins in languages that compile to WASI. It includes a built-in terminal.
Lazarus is an open-source cross-platform IDE for Rapid Application Development powered by Free Pascal. It is Delphi compatible and includes a drag-and-drop form designer and over 200 components, and can convert from Delphi code. It is extendable through packages and has a package manager with an online repository. Documentation and tutorials are available through a wiki, forums and books.
LeanCTX is an open-source context gateway that sits between AI tools and the information they read. It selects task-relevant context, applies supported access and content controls, and records observable context operations and evidence. The engine can run locally through CLI, MCP, hooks and proxy paths, and an SDK embeds supported engine capabilities in applications.
Lightwood is an AutoML framework that generates and customizes machine learning pipelines using a declarative JSON-AI syntax. It handles data types such as numbers, dates, categories, tags, text, arrays and multimedia formats, and includes a time-series mode. Users can override defaults or replace pipeline steps, and the framework generates Python code for the pipeline.
Llama Coder helps developers write, search, review, test, or manage code and projects.
Llama Coder is an open source Claude Artifacts alternative that generates small apps with one prompt, powered by Llama 3 on Together.ai. It uses Llama 3.1 405B from Meta for the LLM and an in-browser preview renderer.
Localforge is a free, open-source desktop GUI for Codex AI, Claude and other LLMs. It runs locally and lets autonomous agent loops edit files, run tests and work on large multi-file codebase tasks. It supports swapping providers and storing prompt templates, and is distributed under the MIT license.
Magic Patterns is an AI design tool for product teams that turns prompts into production-ready UI. It can use existing components and design rules to generate prototypes, and offers an infinite canvas with collaboration. A changelog describes PDF uploads and export options.
An alternative to Supabase for AI Code editors and Vibe Coding tools.
manifest.build is an open source LLM router for AI agents and related tools. It connects AI agents and harnesses to any provider in seconds, supporting subscription, pay-per-token, local model and custom provider options. The tool offers features including model fallbacks, full request logging, autofix for broken provider calls, an LLM gateway for centralized provider management, and observability tools for tracking usage, reliability and costs. The software is open source, allowing users to self-host it or contribute to its development.
Manuskript is an open-source writing tool for writers. It offers an outliner for organizing thoughts hierarchically, a distraction-free mode with word-count or time goals, and a novel assistant that uses the snowflake method. It includes tools for characters, plots and world-building. The page states the software is still in development and in need of extensive testing.
A repository of material for the exercise classes of a Big Data Analytics master course. Hands-on sessions cover Spark and its machine learning library, Map/Reduce implementations of linear regression and alternating least squares, streaming analytics with Recursive Least Squares, and image classification with convolutional neural networks. Material is provided as Jupyter notebooks.
Matt Harrison is a personal blog authored by Matt Harrison. The blog covers topics including Amazon book piracy, the Effective Pandas book, Python and data science courses, and general software development content.
A registry for discovering Model Context Protocol servers, with links to GitHub and API reference documentation. The site lists recently updated servers and provides a base URL for API access.
Melies is an AI studio for filmmaking that generates images, videos, movie posters, voices, music and sound effects. It offers 30+ AI models and a library of 150+ AI actors. A CLI is available for image, video and movie poster generation from the command line. Plans include monthly credits.
Metabob is a real-time, intelligent code analysis engine that runs in parallel with generative AI coding tools.
