Apps & games

knadh/listmonk

Self-hosted newsletter manager that ships as one Go binary — listmonk is a self-hosted mailing list and newsletter manager backed by PostgreSQL, distributed as a single Go binary or Docker image. It bundles campaign management, SMTP, SMS gateway support and a Vue dashboard, giving teams an alternative to SaaS email marketing tools without vendor lock-in.

High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

photoprism/photoprism

Self-hosted AI photo manager that keeps control of your pictures — PhotoPrism is a privacy-first, AI-powered app for browsing, tagging and searching photos and videos, usable self-hosted or in the cloud. It offers a PWA for phone, tablet and desktop, handles RAW and video formats, and supports rich filters by label, location, color and quality.

AI-Powered Photos App 🌈💎✨

m1k1o/neko

Run a shared browser in Docker, streamed live via WebRTC — Neko packages a full browser inside a Docker container and streams it to any client through WebRTC, enabling private, isolated browsing or multi-user shared sessions. It suits teams needing secure remote access, watch parties, or sandboxed browsing without installing anything locally.

A self hosted virtual browser that runs in docker and uses WebRTC.

abus-aikorea/voice-pro

One Gradio UI for TTS, Voice Cloning, Whisper, and Dubbing — Voice-Pro bundles Edge-TTS/Kokoro TTS, zero-shot voice cloning (E2/F5-TTS, CosyVoice), Whisper-based transcription, YouTube download, Demucs vocal isolation, and multilingual translation into one Gradio web app. It targets creators and developers who want an end-to-end pipeline for subtitling, dubbing, and podcast/audiobook production without stitching separate tools together.

Gradio WebUI for creators and developers, featuring key TTS (Edge-TTS, kokoro) and zero-shot Voice Cloning (E2 & F5-TTS, CosyVoice), with Whisper audio processing, YouTube download, Demucs vocal isolation, and multilingual translation.

swimmingbrain/brainotes

A browser-only notebook for handwriting over lecture PDFs — braiNOTES is a local-first, open source handwriting app like OneNote or GoodNotes, but running entirely in a browser tab with no account or server. It's built for students: slides can sit beside your notes or become the pages you write on, with snipping, pen pressure and PDF export, and it works offline once loaded.

Handwritten notes and a whiteboard in your browser. Write with a pen, keep the pdf next to your notes. No account, nothing leaves the browser.

MagicMirrorOrg/MagicMirror

Turn a mirror into a modular smart assistant display — MagicMirror² wraps a modular plugin system in Electron, so no separate web server or browser install is needed to run modules on a Raspberry Pi mirror setup. Built by the original creator with an active contributor community, it suits DIY smart-home tinkerers wanting a customizable hallway or bathroom display.

MagicMirror² is an open source modular smart mirror platform. With a growing list of installable modules, the MagicMirror² allows you to convert your hallway or bathroom mirror into your personal assistant.

Diolinux/PhotoGIMP

A Photoshop-style skin and workflow patch for GIMP 3 — PhotoGIMP reorganizes GIMP's tool layout, shortcuts, and canvas settings to match Adobe Photoshop, easing the switch for former Photoshop users. It now targets GIMP 3+, includes a custom splash screen, and has README translations in ten languages, showing active community maintenance.

A Patch for GIMP 3+ for Photoshop Users

DmNote-App/DmNote

A deeply customizable key viewer for DJMAX RESPECT V streamers — DM Note is a desktop key viewer for DJMAX RESPECT V and other games, built for streamers who want live key input overlays. It offers key mapping, note effects, KPS stats, custom CSS, plugins, presets, and OBS browser-source support on Windows and macOS; a community fork covers Linux.

Make it yours. A customizable key viewer for DJMAX RESPECT V and any game.

owncast/owncast

Run your own live-streaming platform, chat included — Owncast is a self-hosted, single-user live video streaming and chat server you fully control, as an alternative to mainstream streaming platforms. It supports RTMP/HLS broadcasting plus ActivityPub federation, letting streamers own their content, interface, moderation and audience without relying on third-party services.

Take control over your live stream video by running it yourself. Streaming + chat out of the box.

screego/server

Self-hosted screen sharing built for readable code, not just chat — Screego is a lightweight, self-hosted WebRTC screen-sharing tool created to fix laggy, low-quality streams in corporate chat apps like Teams. It supports multi-user sessions, low latency, high resolution, and an integrated TURN server, deployable via Docker or a single binary—ideal for developers wanting a quick, private alternative.

screen sharing for developers https://screego.net/

seamusc/papermono-shopping-list

Firmware that turns the M5Stack PaperMono into a fridge shopping list — Open-source ESP32-S3 firmware (~2,400 lines of C++) for the M5Stack PaperMono e-paper panel, paired with a FastAPI server and phone web UI. Handles partial e-paper refresh, touch input, scheduled low-power Wi-Fi sync and offline queuing. Useful as a household list or a base for other PaperMono projects.

E-paper shopping list for the M5Stack PaperMono, with a FastAPI server and phone web UI

hp6/ai-arena

Four LLMs fight to the death on an 8×8 grid — Instead of a dull leaderboard benchmark, this project pits four AI models against each other in real combat on a grid, complete with chat trash-talk, power-ups, and a referee enforcing legal moves. Great for anyone curious how different LLMs reason and behave under pressure, viewable live at tinyaiarena.com.

pkimpel/retro-1620

A browser-based time machine back to IBM's 1960s core-memory mainframe — This project recreates the IBM 1620 Model-2, a decimal, memory-to-memory scientific computer from 1962, as a runnable web emulator. It's aimed at retrocomputing enthusiasts and historians wanting to explore 1620 architecture and software without original hardware, which IBM stopped supporting in 1970.

Web-based emulator and operating environment for the IBM 1620 Model-2 computer system.

chipmates/museumofages

Walking through Leonardo da Vinci's last house in WebGPU 3D — A nonprofit open-source digital museum rebuilding Clos Lucé, Leonardo da Vinci's last house, as a 17-stop 3D film you walk through. It marks confidence levels for each historical claim and runs on WebGPU/WebGL2 without tracking. Interesting for history, GLAM, and 3D web dev audiences.

Museum of Ages, a digital museum. The past rebuilt in 3D

adrianoz1/ai-video-cut

Turning YouTube videos into viral vertical clips with AI — This Python tool automates the whole short-form clip pipeline: downloading YouTube videos, transcribing with Whisper, finding highlight moments via GPT-4o-mini, and rendering TikTok-style word-by-word captions in vertical 9:16 format. Useful for creators who want to repurpose long videos into Shorts/Reels without manual editing.

Processador Automático de Vídeos do YouTube

tkgally/500-clocks

500 clocks in one HTML file, no libraries, no network — A single self-contained HTML page renders 500 animated clocks—number systems, languages, historical instruments, cellular automata and more—each with explanatory panels. It needs no external libraries or network access and runs straight from disk. Notably, all code and text were written by Claude Opus 5.5 under human direction.

computed-axial-lithography/tomo

A no-code GUI that turns STL files into volumetric print sequences — Tomo wraps VAMToolbox's command-line CAL/VAM optimization pipeline in a four-step desktop GUI: load an STL, voxelize it, optimize the projection sinogram, then preview and export. It ships as a single Windows installer with Python/CUDA bundled in, so researchers and makers can run tomographic volumetric printing without touching Python.

VAMToolboxes GUI

obsproject/obs-studio

OBS Studio Remains the Core Tool for Free Streaming and Recording — OBS Studio is the open-source engine behind most free live streaming and screen recording setups, handling capture, compositing, and encoding for platforms like Twitch and YouTube. Backed by an active community, plugin ecosystem, and translation project, it stays the default choice for streamers and recorders who need a capable, no-cost tool.

OBS Studio - Free and open source software for live streaming and screen recording

laurent22/joplin

Joplin: Markdown Notes with End-to-End Encrypted Sync — Joplin is an offline-first, open source note app that stores notes as Markdown with full-text search, plugin/theme support, and a browser web clipper. It syncs across Windows, macOS, Linux, Android and iOS using end-to-end encryption with Nextcloud, Dropbox, OneDrive or Joplin Cloud, and imports Evernote exports directly.

Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.

TriliumNext/Trilium

A community-driven continuation of Trilium Notes for big personal wikis — TriliumNext/Trilium carries forward the hierarchical, scriptable note-taking app Trilium Notes as a self-hosted, local-first alternative to cloud wikis. It targets users building large personal knowledge bases who want cross-platform access, an Electron desktop app, and ongoing community maintenance with frequent nightly builds.

Build your personal knowledge base with Trilium Notes

alyssaxuu/screenity

A Free Chrome Screen Recorder Built Around Privacy — Screenity is a Chrome extension for screen recording and annotation with no usage caps, aimed at anyone making tutorials, demos, or feedback videos without paying or sending footage to a third party. It uses local tools like ffmpeg and TensorFlow, and an optional EU-hosted Pro tier adds link sharing, multi-scene editing, and captions.

The free and privacy-friendly screen recorder with no limits 🎥

HeyPuter/everything

A Mono-Repo Rebuilding Office, Photoshop and AutoCAD as Open Source — This mono-repo from the Puter team collects open-source, web-based clones of proprietary software across office suites, creative tools, CAD, collaboration, finance and games. Each app lives in its own folder and runs with Node.js, so developers can try, modify or self-host alternatives to Excel, Photoshop, AutoCAD and more.

We're rebuilding and open-sourcing the world’s software from scratch.

alextselegidis/easyappointments

A self-hosted booking platform you fully control — Easy!Appointments is an open-source, self-hosted scheduling system built on PHP/CodeIgniter with MySQL, offering Google Calendar sync and a REST API. It's aimed at businesses wanting full ownership of their booking data instead of relying on SaaS schedulers, and stays free for personal and commercial use while offering optional premium add-ons.

:date: Easy!Appointments - Self Hosted Appointment Scheduler

edde746/plezy

One Flutter client for Plex, Jellyfin, and Emby everywhere — Plezy is a single Flutter-built client that works with Plex, Jellyfin, and Emby servers across desktop, mobile, and TV. Instead of juggling separate apps per server type, users get one native-feeling interface with official app store and direct downloads for macOS, Linux, Windows, iOS, and Android.

Modern cross-platform media server client built with Flutter

ihhub/fheroes2

An Open-Source Engine Rebuild of Heroes of Might and Magic II — fheroes2 reimplements the Heroes of Might and Magic II engine from scratch, requiring original game assets while adding high-resolution graphics, improved AI, and numerous UI and logic fixes. It's aimed at long-time fans wanting the classic turn-based strategy game running smoothly on modern multiplatform systems.

fheroes2 is a recreation of Heroes of Might and Magic II game engine

otya128/winevdm

Run 16-bit Windows apps natively on modern 64-bit Windows — WineVDM ports Wine's 16-bit Windows virtual DOS machine to 64-bit Windows, where Microsoft's own NTVDM can't run since LDT modification is blocked. It bundles a CPU emulator, Win16-to-Win32 relay code generated via convspec, DOS emulation, and handle conversion, letting old Win16 executables run directly after install.inf registers them as native-feeling apps.

16-bit Windows (Windows 1.x, 2.x, 3.0, 3.1, etc.) on 64-bit Windows

stack-chan/stack-chan

Browser-flashable, MOD-friendly firmware for a JavaScript kawaii robot — Stack-chan is an open-source M5Stack robot you can set up entirely from the browser: a Web firmware installer flashes the official M5StackChan CoreS3 without installing the Moddable SDK or ESP-IDF, and a MOD Gallery lets you try or install community apps, including block-based samples editable in-browser. It targets hobbyists who want a cute, hackable JavaScript robot without a local dev setup.

A JavaScript-driven M5Stack-embedded super-kawaii robot.

pollen-robotics/reachy_mini

SDK for Reachy Mini, an open-source robot with an app store — Reachy Mini is an open-source expressive robot aimed at hackers and AI builders, supporting wireless, USB-connected Lite, and MuJoCo simulation setups with no hardware needed. This SDK also plugs into an app store built on Hugging Face Spaces, offering community apps like LLM conversation, radio, and hand tracking.

Reachy Mini's SDK

pch/rawmakase

A Rust RAW Editor That Reads Your Lightroom Catalog — RAWmakase is a cross-platform, non-destructive RAW developer written in Rust, offering Lightroom-style controls and broad format support including monochrome and linear DNGs. Notably, it can import a Lightroom Classic catalog's ratings, flags, labels and develop settings without touching the original files, making it useful for photographers exploring alternatives without losing existing edits.

📸 Free, fast, Lightroom-compatible RAW photo editor for Linux, macOS, and Windows.

LuwuDynamics/xgoduck_hardware

XGO-Duck: a 3D-printable biped adapted from Pollen Robotics' Microduck — XGO-Duck is a hardware starting point for a duck-shaped biped robot built around Arduino UNO Q and 15 Feetech servos, adapted from Pollen Robotics' Microduck. It provides mechanical models, PCB designs, a BOM, and an assembly guide, and links to companion repos for onboard runtime and reinforcement-learning experiments. Suited for makers who want to print, assemble, and then explore custom motion.

Build your own robot duck. XGO-Duck is a 3D-printable biped powered by Arduino UNO Q and 15 servos, adapted from Pollen Robotics' Microduck. Includes mechanical models, PCB designs, a BOM, and an assembly guide. Build it, explore its motion, and make it your own.