October 6, 2022

Help Fix A Bug In Open Source Calendar Task Manager

You should read these troubleshooting methods when an open source calendar task manager error code appears on your PC.

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    Agenda is a program that people use every day, and for good reason. It is an essential tool for facilitating organization, planning, daily routine, visit management and personal improvement.

    An example of Google is Google Calendar, which is an appointment scheduling service provided by Google. It helps hobbyists create events, tasks, schedule and manage appointments, sync and record many things overseas. It also allows users to share events, add locations, and more.

    In the form of an article, we offer you a functional collection of desktop calendar applications that will definitely help you organize important events, manage calendar files and thus align your tasks with your daily routine.

    1- Loading Thunderbird=”lazy Schedule”

    Thunderbird Lighting Graph

    Thunderbird is a free email program from Mozilla. It is open source for each of our Microsoft Outlook counterparts. It offers plug-ins and add-ons that take an idea to the next level of functionality.

    An optional Lighting Calendar allows many users to organize their events, schedules, and tasks.

    While Thunderbird is not currently a top priority for Mozilla, the app still has a lot of loyal users.

    2- Development

    open source calendar task manager

    Evolution is a free and open source personal consulting system that includes a lead email, calendar, and address book. Evolution is usually an open source alternative to Microsoft Outlook for Linux workstations.

    3- Borg Calendar

    Borg Calendar

    Borg Calendar is just a cross-platform desktop calendar task but a tracking manager.

    Borg Calendar offers a handy built-in view switcher, to-do list, pop-up reminders, checklist, simplified project monitoring system, XML import/export, simple address book and more.

    The system can also be used to store your own notes and secure information such as security passwords, etc. with extensive encryption support.



    k5ncal can be based on multiplayer standardsFully supported calendar (iCalendar). It supports advanced recurrence rules, event post-processing, and more.

    k5ncal is released under the GNU GPL and the license requires Java 1.8 or higher.

    5-WLCalendarGadget (Windows)


    WLCalendar is a dedicated, free, light-weight calendar application similar to Windows systems. It supports Windows Vista and 8, 10. Runs smoothly, is popular, supports multiple themes, system notifications, and is translated into 9 languages.

    WLCalendar literally supports multiple calendars, as well as running multiple instances of applications that can typically handle multiple personal or work calendars at the same time.

    WLCalendar works effectively with Live Outlook Calendar, .ics Details, Google Calendar and other journaling applications.


    Over the years, OSMO has been my favorite calendaring program for Linux, especially because it helps me manage my alarms, appointments, contacts, and tasks.

    OSMO offers a lightweight and robust user interface, rich calendar options, event notes, full calendar integration for tasks and modules, contacts and therefore full search support for all modules.

    With OSMO, you can import and extract iCalendar and export contacts in CSV and XHTML format.

    OSMO runs on all major Linux and UNIX systems such as Ubuntu, Arch Linux, Debian, Fedora, Linux Mint, Slackware, Gentoo, OpenSUSE, Puppylinux, Manjaro, FreeBSD, OpenBSD and MX Linux.

    • Platforms: Linux

    7- Office Bell

    Deskcall is a free and open source cross-platform desktop client for Google Calendar. It was created with Electron and released under the GPL-3.0 license.


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  • Day Day Planner is a really simple and lightweight open source calendar app for iPhone for Linux systems. It offers 100% iCalendar format support, keeps data in sync withnative server, multilingual location and system notification.QOrganizer

    open source calendar task manager


    9- Is Your Open Source General Organizer That Helps Energetic People Manage Their Daily Tasks, Schedules, Clocks, Notes, Reminders And Journals.


    qOrganizer Includes Rich Text Technology Features For Editing Logs, Audio Reminders, Attachment Viewing, A Local SQLite Database With Online Calculation Support, MySQL Database Support, And This Multilingual User Interface (translated Into 14 Languages).

    Although The App Hasn’t Typically Been Updated In 10 Years, It Still Uploads Articles Every Week.

    10 — KABE Calendar

    KABE Calendar is a very simple free Windows calendar application written in Delphi/Kylix. It is released under the BSD and LGPLv2 license.

    11-jpeg BSplanner


    BSplanner is a unique open source cross-platform calendar application for managing daily, weekly and monthly activities. It is released under the GPLv2 license.


    Stategr App is a macOS scheduling app with rich calendaring features for macOS and Windows.

    Stategr helps users increase their productivity by managing their sessions, activities, tasks, and meetings with a simple and productive interface.

    Stategr offers iCalendar import-export functionality and a dark niche set of keyboard shortcuts and advanced keyboard shortcuts, as well as color-coded lists.

    The application is written in the C++ programming language and workswith macOS and Windows. Now the developer is doing it in the iOS version.

    13- Itsycal Alt=”” (Mac OS)

    Itsycal is a small, simple calendar app with a collapsible menu bar for macOS. It is licensed from the Massachusetts Institute of Technology.

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    Gestore Di Attivita Del Calendario Open Source
    Gestionnaire De Taches De Calendrier Open Source
    오픈 소스 캘린더 작업 관리자
    Open Source Agenda Taakbeheer
    Open Source Kalender Task Manager
    Gerenciador De Tarefas De Calendario De Codigo Aberto
    Dispetcher Zadach Kalendarya S Otkrytym Ishodnym Kodom
    Menedzer Zadan Kalendarza Open Source
    Kalenderuppgiftshanteraren Med Oppen Kallkod