Xournal++ is an open-source, cross-platform note-taking software, described as a feature-rich modern rewrite of the original Xournal program. It is available for MacOS, Windows, and Linux. The app supports handwritten note-taking with pressure-sensitive styluses and drawing tablets, offers customizable pen, highlighter and eraser tools, includes layers for complex notes, page previews, and supports adding images and various shapes for scientific and general note use.
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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.
YaCy is free software for running a search engine. It can be run locally, used to build a search portal for an organization, used for intranet search, or joined to a decentralized peer-to-peer search network where independently run devices contribute to a shared index.
A list of Japanese learning resources for beginners and advanced learners, covering dictionaries, vocabulary, grammar, reading, media, podcasts, games, software and an encyclopedia. Some sections are marked as coming soon.
YARP is a GitHub repository or organization with source code, releases, documentation, or project resources.
The Yeast Resource Center is an NIGMS Biomedical Technology Research Center based at the University of Washington in Seattle. It develops technology applied to biomedical problems, offers software and research articles, and allows researchers to collaborate using its technology and expertise. Its work includes biosensor development and protein cross-linking mass spectrometry combined with structural modelling.
YieldFinder is a comparison site for savings accounts, money market funds, certificates of deposit and Treasury yields, with rates listed as updated daily. It ranks results by pre-tax rate rather than paid placement and includes bank bonus listings.
yoctocolors is a GitHub repository or organization with source code, releases, documentation, or project resources.
You Don't Need JavaScript is a GitHub repository or organization with source code, releases, documentation, or project resources.
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.
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.
yt-dlc is a developer library or app framework for handling downloads inside software projects.
YTCast is a software project for accessing, managing, or playing streamed media.
Documentation for Z.AI Developer Platform, covering setup, features, and practical usage.
ZAP, the Zed Attack Proxy, is a free and open source web app scanner maintained as a community project. It provides options for security automation, including packaged scans and an automation framework, and a marketplace of community-contributed add-ons.
Zapp provides software and setup resources for accessing or managing video streams.
Zbib is a free online citation and bibliography generator. It supports APA, Chicago, Harvard, MLA and 10,000 additional citation styles. The service does not require user accounts, display advertisements, or local software downloads.
ZDaemon is a multiplayer Doom port based on the original classic Doom from id Software. Players can join matches against monsters or each other, with supported modes including Cooperative, Survival, Deathmatch, Team Deathmatch, Capture the Flag, Double Domination and King of the Hill. It is free and requires a copy of Doom or Doom II to play the original maps.
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.
Zed is a GitHub repository or organization with source code, releases, documentation, or project resources.
Zeplin is a design delivery platform that documents designs, maps user flows and tracks version changes outside design tools. It offers AI Design Review with built-in and custom checks, AI Organize for suggested structure and descriptions, and Connected Components linking designs to Storybook, GitHub and documentation.
ZeroSSL is a certificate authority offering free 90-day SSL certificates and premium annual certificates. It supports automated issuance and renewal via ACME clients and a REST API, plus one-step validation, wildcard and multi-domain certificates, installation checks and SSL monitoring.
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.