My value-for-value proposition

I offer 70+ software projects, programs, and libraries — free to use for anyone in the world. You can even download all the source code, and modify it to your liking. To develop open source software is not without cost though — it takes technical knowledge, time, and effort.

Is my software useful to you? You can pay what you want, but money isn't everything — there are many ways to support the open source and digital rights communities.

Thank you in advance from the free/libre open source software movement 😃

Support options

Donate using Paypal

You can also choose your own donation amount and currency at Paypal. Every once in a while I send thank-you emails to Paypal donors.

Send a postcard

Why not simply send a postcard? I rarely receive snail-mail in this digital age, and it would make my day.

Joel Purra
Wrangelstr. 55
DE-10997 Berlin

Donate Bitcoin

Bitcoin (BTC) is magic internet money, and the best option for international donations.

QR code for Bitcoin donations.


The currency Bitcoin is sometimes abbreviated BTC, XBT, or just .

All Bitcoin donations can be seen in the public (but pseudonymous) blockchain ledger, for example via alternatively via mempool⋯.onion.

Donate via bank transfer

Direct transfers to my bank account are possible internationally. This is particularly suitable for donations in Swedish Kronor (SEK) or Euro (EUR), since transactions within the European Union (EU) are fast and without fees.

Account holder Joel Purra
IBAN SE4692700000092711527077
Receiving bank ICA Banken AB, Sweden
Help in other ways

Each and every one can help out in free/libre open source software and digital rights organizations. It doesn't have to take much effort — start your journey based on your own abilities, wants, and needs.

  • Help someone install and use open source software.
  • Tell a few friends about open source code.
  • Share a few links to open source projects and websites.
  • Improve project translations in your native tongue.
  • Write a bug report.
  • Patch a bug and send a pull request.
  • Join an open source software workshop or meetup.
  • Attend a digital rights workshop or meetup.
  • Become a member of a digital rights organization.
  • Mention to your boss that many open source developers are happy to write code as contractors.
Support other projects

My own open source software is built with the help of many, many other open source projects — thousands when including subdependencies. Akin to standing on the shoulders of giants, I owe my career to the open source and digital rights communities.

Below are some projects, organizations, and individuals, which I consider worthy of promoting. If you would like to explore something interesting, and perhaps extend your support, these would be some of my recommendations.

Selfless Heroes
A puzzle game inspired by algorithm programming. Players control a team of heroes, all following the same set of step-by-step instructions. Learn parallel programming in a fun environment.
Source code, Website
GNU Affero General Public License (AGPL)
A network-aware variant of the GNU General Public License (GPL). With AGPL, authors allow modification of network-accessible software and services, yet require that they remain free/libre open source to those using them.
Website, Wikipedia
Rimworld Multiplayer
Enables playing the (closed-source) Rimworld game cooperatively, a major improvement to the single-player base game. Players construct a colony for their pawns, who have to gather resources and fight off attackers.
Source code, Website
Protects servers by detecting and blocking failed (brute-force) authentication attempts etcetera.
Source code, Website, Wikipedia
GNU core utilities
Coreutils provies basic file, shell, and text manipulation utilities. Indispensible for daily Linux use and script automation alike.
Source code, Website, Wikipedia

These entries are a randomized subset, refreshed periodically. You may recognize some popular projects already; I have tried to also include lesser-known projects and individual efforts, where some extra exposure and support may make a bigger difference.

See also my list of starred repositories on Github for a much broader, mixed list of both useful and interesting projects.