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

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  • 1
    RedNotebook is a graphical diary and journal helping you to keep track of notes and thoughts. It includes a calendar navigation, customizable templates for each day, export functionality and word clouds. You can also format, tag and search your entries. Please find the latest releases at https://rednotebook.app
    Downloads: 19 This Week
    Last Update:
    See Project
  • 2
    Kimai - Time Tracking Software

    Kimai - Time Tracking Software

    Time-Tracking for companies and teams with up to 250+ users

    Kimai is web based software that tracks work time, and classifies it. It tracks time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project, by action. FETCH THE LATEST DOWNLOAD FROM GITHUB: https://github.com/kimai/kimai/releases Record expenses and print customizable invoices in different formats. For further information visit: - https://www.kimai.org - https://www.kimai.cloud - https://github.com/kimai/kimai
    Downloads: 4 This Week
    Last Update:
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  • 3
    time management made easy - timeEdition is targeted at all users in a computer workplace who value detailed documentation of their working hours, whether they use it for customer billing or for monitoring the duration of individual projects.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 4
    todoyu
    Features: web2.0 project- & task-management, timetracking, team organizing, resource management, calendar, interface for your clients and lots more! Content: see license.txt (file section).
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    Downloads: 1 This Week
    Last Update:
    See Project
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  • 5
    A simple agenda tool written in PHP with MySQL backend. An agenda tool accessible everywere there's internet. Easy to install and configure. Key-features include: scheduling appointments, holidays, todo lists, secure access, multiple users, etc.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    BDA is an automotive repair shop ('autoshop' or 'bodyshop') management system, taking a crash estimate through to job card and invoicing. VB6 with Access or SQL back-end. If you download please provide feedback.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 7
    A little tool written in C#(.NET 2.0) to notify you of important events and dates while you are working and forget about time and space. Very small and very useful if you are a programmer, developer or a person who forgets about time while working.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    A personal wardrobe consultant which keeps track of the clothes you have in your closet and helps you to choose them day by day, always suggesting the most stylish and creative combinations. Runs on J2ME enabled devices supporting CLDC 1.1, MIDP 2.0
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    Week Days Finder

    Week Days Finder

    Know any week day after the year 1759!

    Enter any date after the year 1759 and find out what day of the week corresponding to that date! You still think you need a calendar? With this application, you have access to thousands calendars, one for each calendar year! Still think you need the paper calendar or calendar on your operating system? You can for example knowing the day of the week corresponding to 14/12/3000, It's a Sunday! Use "find week days in mass" feature! It's the easily way of know faster the day of week that corresponds a certain date.
    Downloads: 1 This Week
    Last Update:
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  • 10
    Amnesia
    Amnesia is a reminder that allow to define alarms, stickers (post-its) for reminding you some important stuff, and notes about whatever you want. Alarms can be programmed to appear at a given time, stickers can be placed on desktop to view it anytime.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 11
    An object-oriented library written in PHP that allows reading and writing iCalendar files. It is easy to use, fully standards compliant, and powerful. Intended audience: application developers who want to support iCalendar (RFC-2445, iCal).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    CALimba is a multi-user platform to manage your calendar and your contacts.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    ConPortal - the Consultant Portal. A web-based scheduling and timeclock system, ideal for use at service desks.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Conscriptus

    Conscriptus

    Conscriptus Meet up!

    Web and cellphone mobile application to assist persons, groups and companies assign a meeting at the suitable place and time according to their location and time sheet and shared resource planning. Includes goods and service public catalog, shared by people to coordinate their efforts. Affordable for use anywhere and can installed at the company's web site or cellphone thanks to low technical requirements. Implemented in pure C. Designed as SOAP service to easy integration with other systems.
    Downloads: 0 This Week
    Last Update:
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  • 15
    Cálculo de dias úteis para Portugal

    Cálculo de dias úteis para Portugal

    Aplicação para calcular o número de dias úteis entre duas datas

    Aplicação para calcular o número de dias úteis entre duas datas para qualquer cidade de Portugal _______________ NOTA PARA 2012 e doravante: Considerando que o governo eliminou o Carnaval em 2012 e alguns feriados em 2013 e doravante, o programa ainda não os considera como dias úteis. Assim se o intervalo de datas que colocar no programa incluir o carnaval de 2012 (21 de Fevereiro (3ª feira)) ou os feriados eliminados em 2013 e doravante (Dia do Corpo de Deus; Dia de Todos os Santos - 1 de novembro; Implantação da República - 5 de outubro; Restauração da Independência - 1 de Dezembro) : terá de somar um dia útil, por cada dia destes dias que calhe num dia útil, e que estiver dentro do intervalo de datas que colocar como entrada no programa.
    Downloads: 0 This Week
    Last Update:
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  • 16
    DAViCal CalDAV & CardDAV Server
    The DAViCal CalDAV & CardDAV Server is a repository for calendar, todo, journal and vcard entries to be accessed via CalDAV clients such as Evolution, Lightning, Apple iCal or the iPhone. You need to download both DAViCal & the AWL library.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Desktop Calendar is a simple calendar for the windows desktop that uses picture backgrounds that cycle daily, weekly or as a slide show. Adding new skins is simple using GIMP utilities provided. The desktop calendar is written in TCL.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18

    Digital Planner

    Digital Planner

    Digital Planner allows users to create tasks and appointments and will even give you a reminder for scheduled tasks.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Add events from SugarCrm (Meetings,Calls,Tasks) to an Google Calendar account ... with SMS alert enabled.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Helper is an integrated PIM and social networking (blog, RSS, foaf, etc) client. Allows to store, annotate and navigate information uniformly by means of folders, tags and categories. Based on OWL, Eclipse RCP and open standards (Dublin Core, foaf, etc).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    web based groupeware with calendar, contacts / tasks / project management.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    PHP web app to users to convert a Lotus Notes calendar export into a CSV file for import into Outlook.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    M. Vezelis Draw

    M. Vezelis Draw

    Project productivity & cost estimations tool which creates Gantt Chart

    That's project development productivity and cost estimations tool which reflects it in the form of multiple custom diagrams, including the Gantt Chart. The tool provides succinct project metrics related information, and on demand information under each diagram. It allows a user to calculate Function Points, and estimate cost based on COCOMO Basic and Intermediate models.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    MUSC is multiplatform scheduling program and personal information manager with modern design. You can easily create and share your calendar and contacts with other people, get news from RSS, search on internet and more. Support for iCalendar and vCard.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Manage your time, life, project, calendar and to do list in one program.
    Downloads: 0 This Week
    Last Update:
    See Project
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