Tech stack
31 projects use C++.
Run open language models locally with one command
Ollama reduced local model hosting from an afternoon of CUDA troubleshooting to a single pull command. It handles model download, quantisation selection, GPU offloading, and memory management, and exposes an OpenAI-compatible endpoint on localhost.
Inference engine that runs LLMs on almost any hardware
llama.cpp is the layer most local model tooling is built on. It is a C and C++ inference engine with no Python runtime, aggressive quantisation support, and hand-tuned kernels for a remarkably wide range of hardware.
Remote desktop you can point at your own relay server
RustDesk is remote desktop software where the relay server is a binary you can run yourself. That is the whole argument: the same convenience as the commercial tools, without your screen sessions transiting a vendor's infrastructure.
Free 2D and 3D game engine with no royalties
Godot ships a complete engine, editor, and export pipeline under the MIT licence, which means no royalties, no revenue thresholds, and no licensing conversation before a project starts.
Free open-source software for live streaming and screen recording
OBS Studio is free and open-source software for live streaming and video recording, mixing scenes and sources on Windows, Mac, and Linux.
Truly independent web browser with an engine built from scratch
Ladybird is building a new web browser engine from scratch, backed by a nonprofit and free of user monetization such as default search deals.
Columnar OLAP database for real-time analytics at scale
ClickHouse is a column-oriented OLAP database built for analytical SQL queries over very large datasets, serving real-time dashboards and applications.
Self-hosted OpenAI-compatible runtime for local AI models
LocalAI is a self-hosted runtime that runs AI models locally behind OpenAI-compatible endpoints.
Open-source vector database for GenAI search at billion scale
Milvus is an Apache-2.0 open-source vector database that stores and indexes embedding vectors for millisecond similarity search over very large collections.
Speech recognition that runs anywhere, with no runtime
whisper.cpp is a C and C++ port of the Whisper speech recognition model with no Python dependency, quantised weights, and hardware acceleration across Apple Silicon, CUDA, and plain CPU.
In-memory data store and cache with Redis API compatibility
Dragonfly is an in-memory data store and cache with a Redis-compatible API, so existing Redis clients and applications connect without code changes.
Free offline password manager with no cloud or account
KeePassXC is a free, open-source, offline password manager for Windows, macOS, and Linux. It is a community-driven port of the Windows application KeePass Password Safe, and it stores every password, passkey, and note in one encrypted database file on the user's own device, with no account, no cloud, and no telemetry.
Open-source no-code engine for 2D, 3D, and multiplayer games
GDevelop is an open-source, no-code game engine that builds 2D, 3D, and multiplayer games with visual events instead of programming.
Fast, typo-tolerant open-source search engine
Typesense is a fast, typo-tolerant open-source search engine for site, app and store search, with faceting, geo and vector search behind a clean API.
Free browser that blocks ads and trackers by default
Brave is a free web browser for Windows, macOS, Linux, Android, and iOS that blocks third-party ads and trackers on every page.
Free open-source media center for organizing and playing your own library
Kodi is a free and open-source media center that organizes a household's own movies, shows, music, and photos into one browsable library and plays them across TV, desktop, and mobile devices.
Free open-source multitrack audio editor and recorder
Audacity is a free, open-source multitrack audio editor and recorder for Windows, macOS, and Linux, used for podcasts, music, and field recording.
Open-source time-series database for fast SQL analytics
QuestDB is an open-source time-series database that ingests millions of rows per second and queries them with extended SQL over open formats.
Unified open-source object, block, and file storage for clusters
Ceph is a distributed storage system that serves object, block, and file storage from a single cluster built on commodity hardware.
Open-source database for full-text, vector, and hybrid search
Manticore Search is an open-source database engine for full-text, vector, and hybrid search with real-time indexing and a SQL-first interface.
Free digital painting app for illustration and animation
Krita is a free desktop digital painting application for illustration, comics, texture art, and 2D animation on Windows, macOS, Linux, Android, and ChromeOS.
Distributed SQL database for high-concurrency transactions and analytics
OceanBase is a distributed relational database for high-concurrency transactions and real-time analytics with MySQL and Oracle compatibility.
Open-source database for AI data, vectors, and agent memory
Activeloop is an open-source database for AI data that stores text, images, video, and embeddings with vector search and dataset versioning.
Industrial IoT time-series database for edge and cloud
Apache IoTDB is an open-source time-series database for industrial IoT that collects, stores, and analyzes sensor data across edge devices and the cloud.
Free open-source multi-track video editor
Kdenlive is a free open-source multi-track video editor from KDE for polished edits on Linux, Windows, macOS, and FreeBSD.
In-memory graph database for real-time analytics and AI
Memgraph is an in-memory graph database that runs Cypher queries and streaming analytics over live connected data for fraud detection, recommendations, and agent memory.
Free and open source office suite for documents, spreadsheets, and presentations.
LibreOffice is a free open source desktop office suite with Writer, Calc, Impress, Draw, Base, and Math for Windows, macOS, and Linux.
Self-hostable online office suite built on LibreOffice technology.
Collabora Online is a self-hostable browser-based office suite for documents, spreadsheets, and presentations.
Open-source streaming SQL engine for real-time analytics
Timeplus Proton is an open-source streaming SQL engine in a single C++ binary that turns Kafka and log streams into real-time analytics with millisecond latency.
Free open-source multitrack audio editor forked from Audacity
Tenacity is a free, open-source multitrack audio editor and recorder for Windows, macOS, and Linux, forked from Audacity with telemetry removed.
Offline-first, privacy-respecting navigation for hike, bike, and drive.
CoMaps is a community-led offline navigation app for hiking, biking, driving, and city transit.