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

  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Start Free
  • Paessler: Easy to Use With Enterprise Power. Free Trial Icon
    Paessler: Easy to Use With Enterprise Power. Free Trial

    A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.

    You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
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  • 1
    Reqcore

    Reqcore

    Open Source Applicant Tracking System (ATS)

    Reqcore is an Applicant Tracking System built for companies receiving more applicants than they can effectively review. Instead of forcing recruiters to manually screen hundreds of résumés, Reqcore evaluates every applicant against role-specific hiring criteria and turns large applicant pools into a clear, prioritized shortlist. Each evaluation includes an explanation of why the candidate matches, helping hiring teams identify strong applicants without losing them in the noise. Reqcore is best suited to companies whose main recruitment challenge is reviewing applicants—not attracting more of them. It combines applicant tracking, candidate evaluation, pipeline management, and team collaboration in one modern hiring platform. Key Benefits: * Built for Applicant Overload: Manage roles receiving hundreds or thousands of applications without overwhelming recruiters. * Criteria-Based Evaluation: Evaluate every applicant against the qualifications and requirements that matter for
    Downloads: 3 This Week
    Last Update:
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  • 2
    The aim of this tool is to help managers of french healthcare company: - sheduling personel ressource by service - manage working time
    Downloads: 1 This Week
    Last Update:
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  • 3

    Duty Plan

    Creates 24h-Duty-Plans by considering preferences for up to 20 Persons

    Diese schlanke und kostenlose Excel-Tabelle erlaubt es, für bis zu 20 Personen einen 24 Stunden Dienstplan zu erstellen. Die Software Berücksichtigt dabei Wünsche, Abwesenheit und Rufbereitschaften der einzelnen Personen. Nachdem eine Übersicht erstellt wurde, wird der Dienstplan mit der optimalen Verteilung der Dienste erstellt. Hierbei werden Feiertage und Wochenenden Berücksichtigt. Die Software ist nutzbar für alle Monate und Jahre.
    Downloads: 0 This Week
    Last Update:
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  • 4
    PilotGenerator

    PilotGenerator

    Macro VBA générant des feuilles de pilote à partir d'un planning

    PilotGenerator génère des feuilles de pilote, permettant de visualiser les employés présents sur différents postes pour chaque journée. Prend en entrée un planning avec les horaires d'arrivée et de départ de chaque employé.
    Downloads: 0 This Week
    Last Update:
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  • Endpoint Management with Remote Control Built In Icon
    Endpoint Management with Remote Control Built In

    Patch, monitor, and connect to Windows and macOS devices from one console

    Splashtop AEM handles patching, alerts, scripts, and inventory, and unattended remote control is included. When something needs hands-on work, you’re one click away instead of switching tools.
    Start Free Trial
  • 5
    minthcm

    minthcm

    AI-native open-source HR: native Claude & MCP integration

    MintHCM is the first open-source Human Capital Management platform built AI-first: it offers native support for MCP (Model Context Protocol), letting AI agents like Claude work directly inside your HR workflows — handling scheduling, leave requests, performance review prep, and reporting through natural conversation instead of clicking through menus. Beyond AI, MintHCM covers the full employee journey - recruitment, onboarding & offboarding, time & leave management, performance reviews, and analytics with an API-first architecture you can self-host or run on MintHCM Cloud (free for teams up to 15 employees). Open source under AGPL-3.0 - audit it, extend it, own your data. Join the community on GitHub and Discord to follow development or contribute. https://discord.gg/zHu8AfCEVb
    Downloads: 0 This Week
    Last Update:
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