Best Open Source Scheduling Projects
Cal.com
Open-source Calendly alternative
★ 39,987 Updated: Feb 2026 Status: Slowing
Rallly
Find a time that suits everyone by sharing a poll, with no account needed for the people you invite.
★ 5,284 Updated: Oct 2026 Status: Active
W
WebCalendar
PHP calendar for individuals and groups
Status: Unknown
S
SOPlanning
Shared planning tool for tasks and resources
Status: Unknown
E
EasyAppointments
Self-hosted appointment scheduler
Status: Unknown
Q
QloApps
Open-source hotel booking and reservation system
Status: Unknown
Kukkee
Coordinate schedules effortlessly through voting
Status: Unknown