Xournal++ is a handwriting notetaking program with PDF annotation support, written in C++ with GTK3. It runs on Linux, macOS and Windows 10 and supports pen input from devices such as Wacom tablets. The project offers paper backgrounds, drawing tools and shape drawing, and can follow links from a background PDF.
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Xreveal is a Windows application that removes restrictions of DVD and Blu-ray media automatically in the background. It enables read access to a movie disc after insertion, works on-the-fly without storing data to disk, and can optionally remove region codes. It also backs up discs as ISO or folder.
Xtreme Download Manager is a free, open-source download manager for Windows, macOS and Linux. It uses segmented downloading to accelerate transfers, resumes broken downloads, saves streaming video and supports batch downloads. It works with several browsers and offers a scheduler and speed limiter.
Yaak is a local-first API client that stores requests on the user's machine and can sync workspaces to the filesystem for use with Git. It supports REST, GraphQL, WebSocket, gRPC and SSE requests, and includes an CLI and an MCP server plugin for working with AI agents, without built-in AI. A desktop app is available for Mac, Windows and Linux.
YACReader is a comic reader and comic manager that supports cbr, cbz, zip and rar comic files. It is available for Windows, Linux and Mac OS X, with mobile apps for iPhone, iPad and Android and a server and web UI for NAS or home server use. YACReaderLibrary organizes, searches and manages collections, keeping folders as they are on disk and adding metadata, search, reading lists and progress.
YARA is a tool aimed at helping malware researchers identify and classify malware samples. It creates descriptions of malware families, called rules, based on textual or binary patterns; each rule consists of strings and a boolean expression. YARA is multi-platform, running on Windows, Linux and Mac OS X, and can be used via its command-line interface or from Python scripts with the yara-python extension.
Interlude is a free-to-play keyboard rhythm game built for fun, currently in open beta with latest release 0.7.28.6. It allows importing songs, scores and skins from other games, customising hit windows and mechanics via rulesets, and editing noteskin and HUD in-game. It includes in-game downloads for songs and noteskins, plus an Endless mode system.
ynoTV is an open source IPTV player for Windows built on Tauri v2 and mpv. It supports M3U, Xtream Codes and Stalker sources with multiple EPG sources, and offers integrations with Stremio, Nuvio and Jellyfin.
YogaDNS is a Windows DNS client that intercepts DNS requests at the system level and processes them through user-defined servers. It supports plain DNS, DoH, DoH3, DoT, DoQ, DNSCrypt and Anonymized DNS, with DNSSEC validation and rules based on hostname masks and network interfaces.
YouCompress is a free online file compression tool for reducing the size of video, audio, image and PDF files. It accepts formats including MP4, MOV, MP3, PDF, PNG and JPG and works through a web browser on Windows, Mac, Linux, iOS and Android without software installation. Uploaded and compressed files are automatically removed from the servers after a few hours.
YouTube video is a video resource with tutorials, demonstrations, reviews, or related media.
Open Video Downloader is a cross-platform desktop application that provides an interface around yt-dlp for downloading videos, audio, subtitles and metadata from hundreds of supported websites. It runs on Windows, macOS and Linux, with quality control, playlist downloads and a smart queueing system.
Yamagi Quake II is an alternative client for id Software's Quake II that aims to preserve the 1997 gameplay while adding bug fixes, stability and gentle enhancements. It offers modern OpenGL 3.2 and OpenGL ES 3.0 renderers, widescreen support, scalable HUD and surround sound. It supports FreeBSD, Linux, OpenBSD and Windows.
ytDownloader is a desktop GUI application for downloading video and audio from hundreds of sites, including YouTube, Facebook, Instagram, TikTok and Twitter. It offers themes, a video compressor with hardware acceleration, range selection and subtitle options, playlist downloads, and is available on Linux, Windows and macOS.
Zandronum is a multiplayer-oriented port of ZDoom offering dedicated servers and community content. It supports cooperative campaigns, competitive battles and custom game modes, with client/server networking and up to 64 players in a single game. Competitive modes include Deathmatch, Duel and CTF. Runs on Windows, macOS and Linux.
Zeal is an offline documentation browser described as a personal reference library that is searchable in an instant. It offers 981 docsets and is available for Windows and Linux, with Dash suggested for macOS. The listed version is 0.9.1.
Zed is a high-performance, multiplayer code editor created by the developers of Atom and Tree-sitter. Built from scratch in Rust to leverage multiple CPU cores and GPU resources, it is designed for speed, real-time collaboration with other users, and AI-assisted editing. The editor is available for macOS, Linux, and Windows.
Zetane Viewer is a free tool for visualizing machine learning and artificial neural network models, including architecture and internal data such as feature maps, weights, biases and layer output tensors. The viewer supports .ONNX and .ZTN files and is available for Windows, Linux and Mac. It can also be launched from existing scripts or notebooks via the Zetane Python API.
Zettlr is described as a publication workbench and is free and open source software. It is available for macOS, Windows and most Linux distributions, with citations integration for reference managers such as Zotero and JabRef, and exports via Pandoc, LaTeX and Textbundle.
Zophar's Domain is a site listing emulators, emulation news, utilities, savestates, cheats, hacks, music, movies, translations and technical documents, with emulators grouped by platforms including Windows, Linux, Macintosh, consoles, iOS and Android. It also links to ROMs in the public domain.
Zotero is a free, open-source research management tool developed by an independent nonprofit organization. It enables users to collect, organize, annotate, cite, and share research materials. The tool supports over 9,000 citation styles and integrates with common word processors. It is available for Mac, Windows, Linux, iOS, and Android, and users can share libraries with others at no cost for collaboration.
ZXPInstaller is an open source installer for Adobe extensions that replaces the Extension Manager, which Adobe no longer supports as of CC 2015. It installs .zxp extension files and does not manage or uninstall extensions. Downloads are offered for OS X and Windows.