OggSync 10.1.0
Synchronize Outlook with Google Calendar on Windows. OggSync offers manual single-calendar sync for free, with multiple calendars and scheduled sync in Pro.
Software for Windows
Desktop tools and games for Windows. Check each listing for its documented version, license and download details.
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Okular master build 8194 (nightly)
Read PDFs, annotate documents and browse ebooks or comics with KDE's free document viewer. This direct Windows download is an untested nightly build, not the recommended Microsoft Store release.
Ollama 0.40.12
Run open AI models on your Windows PC, chat from the terminal and connect applications through a local API with Ollama.
Omnitux 1.2.0
Practice counting, picture matching, puzzles and memory activities with Omnitux, a free multimedia educational game collection for Windows.
ONLYOFFICE Desktop Editors 10.0.0
Create and edit documents, spreadsheets, presentations and PDFs offline with ONLYOFFICE Desktop Editors, a free office suite for Windows.
OnlyStopWatch 6.63
Measure elapsed time or run a countdown with OnlyStopWatch, a portable Windows timer with a full-screen display and optional milliseconds.
OP Auto Clicker 4.1
Automate repeated mouse clicks on Windows with adjustable intervals, a fixed or cursor-following position, and a repeat count or continuous clicking.
Open Contacts 6.2.1.640
Organize people, companies and their relationships with Open Contacts, a freeware Windows address book with custom fields and contact import/export.
Open Policy Agent 1.22.0
Evaluate policy as code with Open Policy Agent (OPA), an open-source engine for Rego rules, structured data and application authorization decisions on Windows.
Open Yahtzee 1.10
Play Yahtzee on Windows: keep selected dice between rolls, fill thirteen scoring categories and track high scores in a free, open-source game.
OpenArena 0.8.8
Play arena-style first-person matches against other players or bots, with deathmatch, Capture the Flag and objective-based modes in OpenArena.
OpenBoard 1.7.7
Write and annotate lessons on a digital whiteboard with OpenBoard, a free, open-source teaching application for Windows 10 and later.
openBVE 1.14.1.2
Drive trains with simulated brakes, cab controls and positional sound in openBVE, a free, open-source train simulator for Windows.
openCanvas 7.0.25
Draw and paint illustrations with customizable brushes, layers and drawing-process replay in openCanvas for Windows. The publisher offers a 120-day trial.
OpenClonk 8.1
Mine resources, build settlements and fight other players in OpenClonk, a free, open-source 2D action game with tools for creating your own scenarios.
OpenDeck 2.14.2
Configure an Elgato Stream Deck with custom actions, profiles and compatible Stream Deck plugins using OpenDeck, a free, open-source controller app for Windows.
OpenedFilesView 1.91
Find which process holds a file open with OpenedFilesView, a free Windows utility for investigating sharing violations. Administrator rights are required; Windows 10/11 with Secure Boot enabled is unsupported.
openElement 1.57 R9
Design websites visually with openElement, a free Windows web authoring tool with reusable page layers, editable styles and custom elements.
OpenEXR Viewer 0.6.1
Inspect OpenEXR image layers and detailed file metadata with a free, open-source viewer. This download is the Windows 64-bit installer.
OpenHashTab 3.1.1
Calculate and compare file checksums from Windows file properties with OpenHashTab, a free, open-source shell extension with checksum-file checking and export tools.
OpenKara 0.19.2
Turn your own music files into karaoke tracks with OpenKara for Windows, using on-device vocal separation, synchronized lyrics and a portable library.
OpenLieroX 20260717.2
Fight real-time worm battles with OpenLieroX for Windows, a 2D shooter with Internet and LAN multiplayer, custom maps and weapon mods.
OpenRA release-20250330
Play reimagined Red Alert, Command & Conquer and Dune 2000 with OpenRA, a free real-time strategy project with online multiplayer and modern unit controls.
OpenRCT2 0.5.6
Build and manage amusement parks with OpenRCT2, a free, open-source reimplementation of RollerCoaster Tycoon 2. Requires separately obtained RCT2 or RCT Classic game files.