Meme tool for finding or creating green-screen meme clips and reusable visual assets.
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Greenshot is a free, open-source, light-weight screenshot tool for Windows. It can capture a selected region, a window, the fullscreen, or complete scrolling web pages from Internet Explorer. Screenshots can be annotated, highlighted or obfuscated, then saved to file, printed, copied to the clipboard, attached to e-mail, sent to Office programs or uploaded to photo sites.
Guild is a vendor-neutral control plane for AI agents. It lets engineering teams manage, govern, and share agents in production, with security and observability built in. Features include scoped credentials, action approval, policy enforcement, tracing, and evaluations. It supports any model or framework and provides a shared agent catalog and CLI access.
Gut is a user-friendly Git command-line client for Windows, macOS and GNU/Linux, built with Golang. It provides commands such as Save, Ignore, Revert, Undo and Sync, and is fully compatible with Git, allowing switching between the two. It saves credentials in the system keychain and can use GitHub or GitLab to diff changes.
The Gravitational Wave Open Science Center provides access to data from gravitational-wave observatories, along with tutorials and software tools. Its read-only API offers programmatic access to observation runs, event catalogs, single event detections, parameter estimations, data quality and injection segments, and strain datasets and statistics, mostly in JSON format with a Python client recommended for Python projects.
HACK is a mobile client for browsing news links, stories and discussions.
Hackers is a mobile client for browsing news links, stories and discussions.
Hacki is a mobile client for browsing news links, stories and discussions.
Hammerspoon is a tool for automation of macOS, acting as a bridge between the operating system and a Lua scripting engine. Extensions expose system functionality, letting Lua code interact with APIs for applications, windows, mouse pointers, filesystem objects, audio devices, batteries, screens, keyboard and mouse events, clipboards, location services and wifi. Out of the box it does nothing; users create a Lua script in ~/.hammerspoon/init.lua.
Harmoni is a mobile client for browsing news links, stories and discussions.
Haruna is an open source media player for KDE with configurable options. It can play online videos through youtube-dl, supports YouTube playlists, and allows playlists to overlay the video when toggled by mouse-over. It also offers auto-skip for chapters containing certain words, configurable shortcuts and mouse buttons, and a quick jump to the next chapter by middle-clicking the progress bar.
The Harvard-MIT Program in Health Sciences and Technology is an educational initiative that trains the next generation of clinician-scientists and engineers. The program teaches participants to integrate science, engineering, and medicine, translate research findings into clinical practice, and improve human health.
HashMyFiles is a small utility that calculates MD5, SHA1, CRC32, SHA-256, SHA-512 and SHA-384 hashes of one or more files. The hash list can be copied to the clipboard or saved to text, HTML or XML files, and the utility can be launched from the Windows Explorer context menu to display hashes of a selected file or folder. It works on Windows 2000 through Windows 11.
Hayase is a bring-your-own-content torrent streaming client for anime. It streams the user's own torrents in real time and organizes, searches and tracks media the user supplies. It does not host, index or distribute content. Features include an advanced video player, offline viewing, subtitle support and watch-together functionality. It is available on multiple platforms.
HDClipartAll is a clip art library offering HD clipart images across categories such as animals, food, holidays and social media. The site states that images are available for free download for personal use, and it also provides an about and contact page.
Dataset repository covering epidemiology and medical biometry/statistics, with searchable clinical trial data.
healthline reports or organizes updates on science, health, research and the environment.
Heavyweight generates professional-looking demand letters through document formatting. It is made by artist WTTDOTM and lawyer Kendra Albert, and is described as making letters that never actually claim legal authority. Templates include landlord repair requests, workplace examples, overdue client letters and security deposit requests.
Hexabot is a self-hostable AI workflow automation platform. It is used to build AI agents and workflows that interact across channels, using MCP tools, memory and data control. Projects can be started locally with the official CLI, and the platform is source-available under the FCL-1.0-ALv2 licence.
HeyGen is an AI video platform that creates videos with a Personal Avatar using the user's face and voice without filming each video. AI Studio offers a text-based editor for tone, delivery, gestures and emotion, and includes voice cloning and voice mirroring. It also offers the Seedance 2.0 video model from ByteDance for turning text or images into multi-shot clips.
HiCompress is an online image tools site offering over 20 free tools. It supports converting, compressing, editing and resizing images with simple clicks. Tools include JPG, PNG, WEBP, BMP and GIF compressors, crop tools, converters among formats and DPI converters, along with PDF tools such as compress, merge and split.
HidHide is an input device firewall that blocks individual applications from accessing HID and XInput devices, allowing controller inputs to be re-routed and re-mapped. It is inspired by HidGuardian but written from scratch, and ships with a client UI, a command-line interface and driver access for developers.
Search atmospheric, oceanography and climate data collections and supporting geospatial data from PRT.
Find and access atmospheric, oceanography and climate research data, with indexed datasets.