Open Source Desktop Operating Systems Calendar Software

Calendar Software for Desktop Operating Systems

Browse free open source Calendar software and projects for Desktop Operating Systems below. Use the toggles on the left to filter open source Calendar software by OS, license, language, programming language, and project status.

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
    Start Free
  • Try Google Cloud Risk-Free With $300 in Credit Icon
    Try Google Cloud Risk-Free With $300 in Credit

    No hidden charges. No surprise bills. Cancel anytime.

    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
    Start Free
  • 1
    BORG is a calendar and task tracking system written in Java. The calendar provides a nice month view, month-print, email reminders, popup reminders and to do list. The task tracker tracks issues through various states.
    Downloads: 45 This Week
    Last Update:
    See Project
  • 2
    This is a free OpenSource Microsoft Project file Viewer. It relies on the "Apache POI - Java API To Access Microsoft Format Files" project. A bundle distribution of the application can be accessed from the following url: http://mspviewer.blogspot.com/ If you like this software and are a developer, check out: https://sourceforge.net/projects/crudzillawebapplicationbuilder/
    Downloads: 1 This Week
    Last Update:
    See Project
  • 3
    Tpl makes it easy to serialize your C data using just a handful of API functions. The data is stored in its native binary form for maximum efficiency. C, Perl and XML supported. Data is portable across CPU types and OS's from Unix to Mac to Windows.
    Leader badge
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4

    ASRemind

    Reminders & Notes application

    ASRemind is a desktop reminder application that links to a user's Google Calendar's entries and reminds them of upcoming activities. It also allows a user to enter notes on the various activities that a user is doing.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8 Monitoring Tools in One APM. Install in 5 Minutes. Icon
    8 Monitoring Tools in One APM. Install in 5 Minutes.

    Errors, performance, logs, uptime, hosts, anomalies, dashboards, and check-ins. One interface.

    AppSignal works out of the box for Ruby, Elixir, Node.js, Python, and more. 30-day free trial, no credit card required.
    Start Free
  • 5
    A calculator for dates. May calculate how many days there are between two dates or the next date from a starting date. Runs on Palm Os and Windows.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    A multiuser Diary Management System that will enable staff in organisations to set/update/view meetings and appointments. The system will operate via a central server, but clients will able to function offline. It will support Mac OSX/Windows/*nix
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Events Managements Aid System
    EMAS is a web-based system written in ANSI C which provides the user a great way to manage your events.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Eventual

    Eventual

    Personal time management system for Haiku OS.

    Intended to be full-featured organizer. Based on B.Sc. project for Haifa University, Israel.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    KResource connector between Kontact and the WCAP protocol
    Downloads: 0 This Week
    Last Update:
    See Project
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • 10
    QOrganizer

    QOrganizer

    QOrganizer - personal and business information organizer.

    QOrganizer - personal and business information organizer using AES128 to encrypt user data. QOrganizer is a lightweight personal and business data organizer. By using Qt QOrganizer is multiplatform and AES128 encryption is a great way to keep things private. I would be very thankful for reporting every issue and sharing every useful tip. QOrganizer consists of: calendar, mail client, notes, adress book, feed reader, password manager You could help in developing this software by donating: Bitcoins: 17wTU13S31LMdVuVmxxXyBwnj7kJwm74wK Michał Karol mkarol@linux.pl Dependecies: libssl-dev, libqt5webkit5, libqt5concurrent
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Taskwarrior
    Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant productivity tool. You'll find it has customizable reports, charts, GTD features, Lua extensions, synching and more, with excellent support!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    The Medical Scheduler
    The Medical Scheduler handles scheduling of hospital staff as well as producing the information required for payroll. Schedules can be generated using either or a combination of both requests data or manual drag and drop.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • Next
MongoDB Logo MongoDB