GRR

Open-source booking system for rooms, vehicles and equipment

About GRR

GRR is an open-source resource reservation system for organizations that share rooms, vehicles, equipment or staff time. Administrators define resource types and access rules, while users book through visual schedules with support for recurring reservations, reservations pending confirmation or moderation, bookings made on behalf of others, per-user quotas, custom fields per area, and automated email notifications. Written in PHP with a responsive interface, it is used by associations, local authorities and companies to coordinate shared resources without booking conflicts.

GRR website preview

Live preview of grr.devome.com via the WordPress mShots service — it can take a few seconds to generate on a first visit.

GRR: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers room booking, resource management, open source, scheduling — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 2092 tools in the Productivity & Notes category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

GRR pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	grr.devome.com

GRR key facts

Category: Productivity & Notes
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: room booking, resource management, open source, scheduling
Official site: grr.devome.com

GRR FAQ

How much does GRR cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (grr.devome.com).

What is GRR used for?

Open-source booking system for rooms, vehicles and equipment Its focus areas in the Productivity & Notes category: room booking, resource management, open source, scheduling.

Where can I try GRR?

On its official site, grr.devome.com — the Visit Official Site button above goes straight there.

GRR vs alternatives

	GRR	Cal.com	Cal.diy	Framadate
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Freemium — a free tier lets you start, and paid plans are available if you need more.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	room booking, resource management, open source, scheduling	scheduling, booking pages, meetings, open source	scheduling, self hosted, open source, booking	scheduling, polls, open source
Official site	grr.devome.com	cal.com	cal.diy	framadate.org
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Productivity & Notes category

Notes, tasks, and project tools that keep you organized and focused. The Productivity & Notes category on Tools Hub currently lists 2092 tools. Alongside GRR, it includes OpnForm, Ideon, Roundup Issue Tracker, TiddlyWiki.

FreeProductivity & Notesroom-bookingresource-managementopen-sourcescheduling

Alternatives to GRR

Tools in the same Productivity & Notes category that share focus areas with GRR — worth comparing before you commit:

Productivity & Notes

Cal.com

Open-source scheduling platform with booking pages and team routing

Freemiumschedulingbooking-pagesmeetingsopen-source

Productivity & Notes

Cal.diy

Open-source community edition of Cal.com for self-hosted scheduling

Freeschedulingself-hostedopen-sourcebooking

Productivity & Notes

Framadate

Plan meetings and make decisions with free scheduling polls

Freeschedulingpollsopen-source

Productivity & Notes

pretalx

Call for Papers and scheduling for conferences

Freemiumconferenceseventscfpscheduling

Productivity & Notes

Rallly

Create polls to find the best time for group meetings

Freemiumschedulingpollsmeetingsopen-source

Productivity & Notes

7shifts

Scheduling platform built for restaurants

Freemiumschedulingrestaurantslaborcommunication

More in Productivity & Notes

Comparing tools in the Productivity & Notes category? These related listings are worth a look: OpnForm — Free online form builder with unlimited responses; Ideon — Spatial workspace that organizes projects on an infinite canvas; Roundup Issue Tracker — Flexible issue tracking with web, email and command-line interfaces.