Booking and Scheduling

10 applications, ranked by GitHub stars in the dataset.

Cal.diy
Online appointment scheduling system.
Replaces Calendly
49,583 stars Active
30 Oct 2026 v6.2.0
QloApps
Customizable and intuitive web-based hotel reservation system and a booking engine.
14,456 stars Active
30 Oct 2026 v1.7.0
Rallly
Create polls to vote on dates and times.
Replaces Doodle
5,333 stars Active
31 Oct 2026 v4.16.3
Easy!Appointments
Allows your customers to book appointments with you via the web.
4,467 stars Active
19 Oct 2026 1.6.1
Hi.Events
Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets.
4,102 stars Active
29 Oct 2026 v1.11.3-beta
Alf.io
Ticket reservation system.
Replaces Calendly
1,626 stars Active
29 Oct 2026 2.0-M5-2609
LibreBooking
Resource scheduling solution offering a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations.
Replaces Calendly
840 stars Active
31 Oct 2026 v7.1.0
OpenSlides
Presentation and assembly system for managing and projecting agenda, motions and elections of an assembly.
661 stars Active
20 Oct 2026 4.3.6
Seatsurfing
Webbased app to book seats, desks and rooms for offices.
Replaces Calendly
316 stars Active
30 Oct 2026 v1.139.0
Chobble Tickets
Event ticketing with QR check-in and encrypted attendee records. The complete product is AGPL-3.0 with no open core and no branding requirement, and it runs as an edge script without an always-on server.
36 stars Active
31 Oct 2026 v2026-10-03-091652