Open Source #desktop-app Projects

A free, open-source real-time strategy game about ancient civilizations, with single-player, multiplayer, and modding support.

Free cross-platform password manager compatible with KeePass, available as a desktop and web app.

Open-source platform for fine-tuning and running LLMs locally — 2x faster training with 70% less VRAM. Supports LoRA, QLoRA, DPO, GRPO.

A free, open-source PDF editor for Linux that lets you edit text, images and objects, merge documents, and export to DOCX, PPTX and more.

A free, open-source desktop image editor that replicates the Photoshop interface with 1:1 native PSD/PSB file compatibility.

Free, open source mind mapping and knowledge management desktop app for Windows, macOS and Linux with scripting, LaTeX and add-ons.

Open source desktop Markdown presentation editor with live preview, themes, and PPTX export — a self-contained alternative to PowerPoint.

A desktop GUI application for the Hugo static site generator, designed for content editors without command-line knowledge.

Cross-platform desktop app that removes EXIF and hidden metadata from 90+ file formats before sharing.

Free open-source non-linear video editor with hardware-accelerated compositing and cross-platform support.

Focalboard is an open-source, self-hosted project management tool — a free alternative to Trello, Notion, and Asana for boards, docs, and team planning across every workflow.

Privacy-first password manager with built-in email aliasing. Fully encrypted and self-hostable.

Open-source desktop AI coworker with a living knowledge graph, built-in email, browser, meeting notes, and code mode.

Scratch is a minimalist, offline-first markdown note-taking app for macOS, Windows, and Linux. Plain text files, keyboard-driven, with no cloud lock-in or account required.

Open-source Bloomberg-style finance terminal built in C++20/Qt6 with embedded Python, AI agents, and 100+ data connectors.

Free, open-source disk cleaner for Windows, macOS and Linux. Find caches, large files, duplicates and app leftovers, see where your space goes, and review files before deleting them.

Cross-platform FFmpeg GUI for lossless video and audio cutting, merging and remuxing — no re-encoding, no quality loss.

A fast, privacy-first local markdown note-taking app built with Tauri and SvelteKit. Your notes stay as plain .md files on your device.

Free, open-source desktop video editor for Linux, Windows, and macOS built with Qt 6 and FFmpeg.

Cross-platform lossless music player with rich library management, synced lyrics, and gapless playback for Windows, macOS, and Linux.

Open source desktop genealogy program for building and exploring detailed family trees with full local data control.

Cross-platform ebook reader supporting PDF, EPUB, MOBI, comics and more, with sync across Windows, macOS, Linux, Android, iOS, and Web.

Lightweight, free PDF, eBook, and comic reader for Windows that launches instantly and stays out of the way; multi-format support with minimal interface.

A self-hostable, GUI-first AI coding agent with editable conversation trees, plugin-based tools, and multi-client sessions.

Turn raw screenshots into polished, shareable visuals. Free, open-source, and completely offline with Tauri.