Open Collective

OpenSAK

COLLECTIVE
Open source
python
geocaching
dekstop-app
Fiscal Host: Open Source Collective

OpenSAK is a free, cross-platform geocache management tool for Linux, Windows and macOS — a modern, open-source successor to GSAK.

This is OpenSAK's pageOpenSAK
Contribute
Budget
About
Code Signing (Windows & macOS)
$410
per year
Today's Balance
$506.93
Estimated Annual Budget
$659

Contribute

Become a financial contributor.

Financial Contributions

Membership
Yearly support

Join us for $10.00 per year and support us

$10 USD / year

Latest activity by

Custom contribution
Donation
Make a custom one-time or recurring contribution.

Latest activity by

+ 17
Recurring contribution
Backer

Become a backer for $5.00 per month and support us

Starts at
$5 USD / month

Latest activity by

Recurring contribution
Sponsor

Become a sponsor for $100.00 per month and support us

Starts at
$100 USD / month

Latest activity by

Be the first one to contribute!

Top financial contributors

1
MJTBC Geocaching

$210 USD since Jul 2026

2
Allyn

$50 USD since Jul 2026

3
pjacklam

$50 USD since Jul 2026

4
Don Rodolphos

$30 USD since Aug 2026

5
Guest

$25 USD since Jul 2026

6
CheminerWill

$20 USD since Jul 2026

7
Mike Wood

$20 USD since Jul 2026

8
Joseph

$20 USD since Jul 2026

9
Guest

$20 USD since Jul 2026

10
Telemag

$20 USD since Jul 2026

11
Vyrembi

$20 USD since Jul 2026

12
Guest

$20 USD since Jul 2026

13
Ronald

$20 USD since Jul 2026

14
Bert Arnold

$12 USD since Jul 2026

15
AgreeDK

$10 USD since Jul 2026

16
Kai Team

$10 USD since Jul 2026

17
Hr og Fru Danmark

$10 USD since Jul 2026

18
Yxza

$10 USD since Jul 2026

19
_APM_

$10 USD since Jul 2026

20
DL3BZZ

$10 USD since Jul 2026

OpenSAK is all of us

Our contributors 21

Thank you for supporting OpenSAK.

MJTBC Geocaching

Admin

$210 USD

AgreeDK

Admin

$10 USD

Allyn

$50 USD

pjacklam

$50 USD

Don Rodolphos

$30 USD

Guest

$25 USD

CheminerWill

$20 USD

Mike Wood

$20 USD

Joseph

$20 USD

Guest

$20 USD

Telemag

$20 USD

Vyrembi

$20 USD

Budget

Transparent and open finances.

Apple Developer Program

Category
Hosting & Subscriptions
from AB Green to OpenSAK •
-kr 779.00 DKK
~$120.63 USD
Approved
Monthly financial contribution to OpenSAK (backer)

Credit from Hr og Fru Danmark to OpenSAK •

+$5.00USD
Completed
Contribution #966241
Monthly financial contribution to OpenSAK (backer)

Credit from AB Green to OpenSAK •

+$1.00USD
Completed
Contribution #966323
$
Today’s balance

$506.93 USD

Total raised

$506.93 USD

Total disbursed

--.-- USD

Estimated annual budget

$659.00 USD

About

OpenSAK — Open Source Swiss Army Knife for Geocachers 
OpenSAK is a free, open-source geocache management application built as a modern, cross-platform successor to GSAK. It runs natively on Linux, Windows, and macOS, giving geocachers a powerful tool to organize, filter, and explore their caches without being tied to a single operating system. 
With OpenSAK you can import Pocket Queries and GPX files, manage multiple independent databases, filter your caches with a flexible rules engine, browse an interactive map, and export directly to Garmin GPS devices — all through a clean, translated interface available in 8 languages. 
OpenSAK is built entirely by volunteers in their spare time, for the love of the hobby and the community around it. Your support through Open Collective goes directly toward keeping the project sustainable: covering costs like code signing certificates for Windows and macOS (so the app installs smoothly and safely on every platform) and other infrastructure needed to keep releases flowing. 
Whether you're a long-time GSAK user looking for a modern alternative, or new to organizing your geocaching adventures, OpenSAK is built for you — and built with you, through feedback, translations, and testing from our growing community. 
Thank you for supporting open-source geocaching tools!

Our team

MJTBC Geocaching

Admin

AgreeDK

Admin