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Top Rated Calendar Software with Open source - Page 14

Last updated: September 2026

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384 software options

SmartCal Pro logo

AI-powered email scanning and calendar automation

SmartCal Pro is a calendar automation tool that uses artificial intelligence to scan emails for important dates and appointments. The software integrates with Gmail, Outlook, and Apple email accounts to automatically detect deadlines, renewals, and scheduled events from email content. It offers automatic calendar synchronization, custom reminder settings, color-coded event categorization, and a booking page feature for appointment scheduling.

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Spalopia logo
(0)

Management software for spas

Spalopia Business is a spa management software that offers an online diary to manage spa appointments, a booking engine for online reservations, a website builder, customer relationship management tools to store client records, and integrations with hotel property management systems.

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ActiveCollab logo

A productivity and collaboration workspace for teams

Work management for agencies and service teams: projects in List, Kanban and Gantt view, time tracking on every task, workload and capacity planning, estimates, invoicing and online payments — with unlimited free client seats. Cloud or self-hosted. Integrates with Slack, Zapier, QuickBooks and AI as

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GoalsOnTrack logo
(0)

Cloud based goal setting and goal management software

GoalsOnTrack is a web-based goal setting software designed to help users set, prioritize & pursue SMART goals, and stay on track at all times. The software offers a range of features to let users plan action steps & follow through, including action plans, recurring tasks, habit trackers, and more.

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Understory logo
(0)

Software that handles bookings, calendar, and marketing.

Manage experience bookings with an intuitive calendar that handles one-time events, recurring schedules, and private requests. Filter views, enable guest rescheduling, and grant unlimited team access. Platform integrates with your calendar through iCal.

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Add to Calendar PRO logo
(0)

The fair event marketing suite.

Add to Calendar PRO is an event management software that simplifies event sharing, RSVP collection, and calendar integration. It supports multilingual and GDPR-compliant workflows, brandable forms and widgets, event landing pages, and offers automation tools for streamlined event distribution.

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Microsoft Project Server Subscription Edition logo

Project portfolio management software

Project Server is an on-premises software designed to help businesses plan, monitor, manage, and deliver project portfolios. The platform enables managers to view real-time project status along with the most current information on resource availability, document usage, and more on a centralized dashboard.

Read more about Microsoft Project Server Subscription Edition

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Calfeed logo
(0)

Plain text to shareable calendar converter

Calfeed is a calendar management tool that converts plain text schedules into shareable calendar links compatible with Apple, Google, Outlook, Microsoft 365, and Yahoo. The platform accepts various input formats including plain text, CSV files, images, PDFs, and public event page URLs to generate live calendars. It provides automatic synchronization across calendar applications when edits are made, maintaining a stable URL that does not require re-importing or re-adding.

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Routine logo
(0)

Cloud-based calendar solution for individuals and teams.

Routine is a all-in-one work operating system that leverages a graph-based architecture to centralize work (tasks, meetings, tickets, clients etc.) from third-party services into a unified workspace.

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FreshFlow logo
(0)

Business activity management and tracking system

A calendar that generates real-time statistics from logged activities and results and tracks customer relationship history through its connection with a contact database (lightweight CRM solution).

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Hunt Calendars logo
(0)

The website calendar your members actually check.

Live website calendars with automatic reminders. Members can subscribe in Google Calendar, Apple Calendar, or Outlook — your events appear in their app the moment you post them. Flat-rate from $4.95/month — unlimited users, no per-seat fees.

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Bookplan logo
(0)

Booking system for salons and restaurants

Centralized calendar management for appointments, reservations, staff schedules, and daily business planning.

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Appointible logo
(0)

Get booked. Serve clients. Grow your business.

Online Booking System for your beauty business. We help you stay organized, get more done and grow your business faster. Book more appointments, organize your business calendar on the go, manage your staff, and reduce no-shows with text reminders. Grow your business with text marketing.

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IntraHub logo
(0)

Project management tool with time tracking and data security

IntraHub is an interactive and transparent project management system that provides team organization, company communication, and document storage. IntraTime is a flexible time recording and invoicing module that allows users to define how your working hours are recorded and automatically creates individual invoices for every employee. The IntraTime module also includes tools for coordinating and managing your employees, including statistics and evaluations.

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Addenda Repair logo
(0)

An all-in-one platform for managing garage operations

Addenda Repair is an AI-powered garage management platform that helps workshops manage inspections, estimates, workflows, technicians, inventory, customer communication, HR, and accounting from one connected system.

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3veta logo

All-in-one platform for video meetings, scheduling, payments

3veta is a tool which helps you build you own online platform in a couple of minutes.

3veta provides you with everything you would want a software developer to build for your online business: Scheduling, Live video, Payments, Website Builder, CRM, and more.

All with your name on it.

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CorpSync logo
(0)

Automatically sync corporate contacts to phones and Outlook

CorpSync is a cloud-based solution that seamlessly syncs corporate contacts to employees' smartphones, Outlook, and Microsoft Teams, ensuring secure and up-to-date access to business contacts. 

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Pyas logo
(0)

Calendar Integrations API for Startups

Pyas is a calendar integrations API that allows development teams to build calendar integration features in minutes instead of months.

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lemcal logo
(0)

Cloud-based booking and calendar management tool

lemcal is a cloud-based platform designed to help users handle meeting and calendar management processes. It offers professionals and businesses a streamlined solution for scheduling appointments, integrating third-party tools, and fully customizing booking pages. Its ease of use, combined with features like multi-calendar connections, unlimited meeting types, and advanced customization, helps users optimize their time and enhance engagement with clients or colleagues.

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ZoomMate logo
(0)

Cloud-based agentic AI workspace for Zoom Workplace

Cloud-based agentic AI workspace built into Zoom Workplace, automating meeting follow-up, content creation, and task management.

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Kiute Pro logo
(0)

POS & online booking for hairdressers, beauty salons & spas

FlexyBeauty is a cloud-based business management & POS solution for beauty parlours, hairdressers, and spas, which supports online booking, customer loyalty programs, service packages, inventory management, website integration, payment processing, and more, with custom mobile apps for iOS & Android

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GuestWeave logo
(0)

One Calendar for all major vacation rental platforms.

Vacation rental synchronisation app that coordinates reservations on airbnb, booking.com and vrbo. Free tier already super useful and does not require any costly APIs.

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hitAppoint logo
(0)

Online appointment scheduling software for SMBs

Online appointment scheduling software for small businesses and individuals to take advantage of easier and faster appointment booking online.

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Calday logo

Cloud-based appointment scheduling software

Calday is an online appointment scheduling tool designed to streamline the scheduling process for small businesses and solo entrepreneurs. With its user-friendly interface and advanced features, Calday empowers users to manage appointments, schedule meetings, and send automatic reminders with ease.

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Timezy logo
(0)

Online scheduling for service professionals

Timezy is an online appointment management software designed for businesses and professionals to organize bookings and client interactions. The platform features calendar synchronization with Google Calendar, Microsoft Outlook, and Zoom, along with integrated artificial intelligence that converts voice notes into automated emails. It includes Stripe payment processing, customizable booking links, service management tools, and analytics dashboards accessible across multiple devices.

Read more about Timezy

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