PuTTY 0.85
Open SSH, Telnet and serial terminal sessions with PuTTY, a free Windows client with saved connection settings and session logging.
Software and games, with the details that matter. Explore the collection or narrow it down to the platform you use.
Open SSH, Telnet and serial terminal sessions with PuTTY, a free Windows client with saved connection settings and session logging.
Compress and prepare textures for graphics applications with PVRTexTool for Windows, using a visual editor, command-line batch processing or a C library.
Design photovoltaic systems, model shading and compare energy-yield simulations with PVsyst for Windows. A one-month trial is available before paid licensing.
Write, run and debug Python projects with PyCharm for Windows, including free core tools and Jupyter notebooks alongside optional Pro features.
Write, debug and test Python projects on macOS with PyCharm. Core tools remain free; advanced web, database and remote-development features require Pro after the trial.
Plan EVE Online ship fittings outside the game with pyfa, a free, open-source fitting assistant for Windows. Experiment with modules and save fits before committing to a setup.
Explore 3D molecular structures, render scientific figures and build animations with PyMOL for Windows. The publisher's packaged edition requires a license.
Write and run Python scripts on Windows with the open-source interpreter, standard library and optional IDLE editor. This download is the Python 3.15.2 x64 installer.
Write and run Python programs on macOS with the open-source interpreter, the bundled IDLE editor and shell, and Python Launcher.
Manage several folders in one window with Q-Dir, a free Windows file manager with up to four panes, tabs and saved folder combinations.
Calculate with units, convert currencies and work with symbolic expressions in Qalculate!, a free desktop calculator for Windows.
Manage torrents and magnet links with qBittorrent, an open-source Windows BitTorrent client with file priorities, RSS filters and scheduled bandwidth limits.
Manage torrents and magnet links on Mac with qBittorrent, a free, open-source client with bandwidth scheduling, RSS filters and remote Web UI control.
Draw 2D technical plans with layers, dimensions and reusable blocks in QCAD for Windows. The linked Professional trial runs for 15 minutes per session.
Draw electrical schematics with QElectroTech, a free, open-source diagram editor with a searchable symbol library and custom element tools. This download is the Windows x64 installer.
Create maps, edit geographic layers and analyze spatial data with QGIS, a free, open-source desktop GIS. This entry links to the publisher's Windows standalone MSI installer.
Create maps, edit geographic layers and analyze spatial data with QGIS, a free, open-source GIS for Mac. This download is the 3.44.15 long-term release.
Prepare models for QIDI 3D printers on a Mac with slicing presets, model-editing tools and layer-by-layer print previews.
Create QR codes from text with qikQR, a free, open-source Windows desktop app with image export and appearance settings. Generation uses an online service; the project is archived.
Browse image folders, crop and resize pictures, and move selected files with Qimgv, an open-source image viewer for Windows.
Explore large text and NDJSON logs with QLogExplorer, a free, open-source log viewer with regex-defined columns, reusable templates and multi-parameter filters.
Play music files and audio streams with Qmmp, a free Windows audio player with Winamp-style skins, playlists and a 10-band equalizer.
Play video and audio with QMPlay2, an open-source media player with FFmpeg format support, Audio CD playback and a built-in YouTube browser.
Restore files and folders from QNAP HBS .qdff backups on Windows. Preview backup contents and select a saved version before extracting the data you need.
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