Payments Hackathon is organized 7-9 December in Helsinki, Finland. Bitcoiners welcome!
Sourcecode from the event:
- jeremias and justmoon
- Andreas Schildbach and Grazcoin (hackathon branch) Berlin2012Winner
- Clone of BitcoinJ for Multisig
 Bitcoin Hackathon, Berlin 13-15 July, 2012
Berlin Bitcoin Hackathon, 13-15 July: hackers will gather in Berlin geekdom for a weekend of intense coding an collaboration. Sunday we party at room77: the restaurant at the end of capitalism. Participants are coming in from Switzerland, Austria and Finland. The event is free.
Important: this event is for the general public, and not only programmers. We actively welcome people with diverse skills like media or activism. There are many interesting non-programmer projects like a street marketing campaign, or graffiti designs for the guerilla artist.
Refreshments and food are sponsored. Best three teams win prizes and free meals.
Sponsors and questions to firstname.lastname@example.org.
Hackathon - people gather together at one place, hacking, programming, brainstorming, developing and launching a product in one weekend!
Meet other skillful technologists. Form teams. Share ideas. Execute.
Also if you are a designer/marketer/any other skill set, please come. Some projects have need for diverse skillsets :)
Gain fame & prizes by winning the competition.
twitter hash tag #btchackathon
 Where? The Location and Venue.
In Berlin, natürlich! Bier, Bratwurst und Bitcoin!
Hosted in the offices of In-Berlin, a local Berlin Linux ISP. Lehrter Str. 53, 10557 Berlin
13.-15. July : starting on friday at 17:30
- jeremias (kangasbros - django-bitcoin)
- Andreas Schildbach (Bitcoin for Android)
- Joerg Platzer (room77)
- Andreas Petersson (bitcoin-austria), alias yellowhat
- Stefan Thomas (WeUseCoins, BitcoinJS)
- Mike Hearn (BitcoinJava)
Add your nickname to the list above, or join the event on facebook, to help us estimate how much we need refreshments etc.
 Loose rules
1. Form a team, and decide project you are going to work on;
2. Present your project to the jury at the start of the event. You can also try to recruit other people to your project.
3. Explain and demo what you have accomplished at the end of the event.
Note that you can work on whatever you want, be it open source project, your new startup or anything else. Also there is no need to take part in the competition, if you are not a competitive type - you can just turn up, and work on whatever you want.
- Bitcoin powered video game
- Point Of Sale system
- P2P local trader system
- Electrum style clients
- Brainwallet "offline" HTML5 connecting to stratum servers with deterministic keys and no storage at all.
- Mobile dev
- Art installations
- Street project with Bitcoins
- Anonymising services
- Bitcoin prediction market - Intrade clone (hard)
- BitcoinQR service with currency conversion (easy)
- ElectrumPOS - easy, safe, painless way of accepting bitcoins at some shop
- Anonymous double-blind review portal for scientific papers with moderation and meta-moderation (hard)
- Translation Tool with btc bountys for translations - download to popular xml/yaml/properties files. (medium)
- Offer your wifi for Bitcoin in a neighbourhood -> incentivises people to create mesh networks
- POS system to print QR codes to receive payments in a restaurant.
- Board to display payments for orders at a restaurant.
- Guerilla marketing campaign
- New graphics / icons
- UI review of Bitcoin clients, and improvements
- Design perfect Bitcoin system
- Double-Spend challenge - bounty site. Offer increasing amounts of bitcoins for successful double-spend attacks.
- GuessMyBrain - a bitcoin challenge game with the aim of guessing the pass-phrase of a brain wallet according to a riddle with limiting rules, and taking the jackpot simply by spending that wallet.
- MyOtherHalf - a bitcoin social game that forces two random people to cooperate in order to spend a brain wallet which is created using the two secrets and the combined amount of bitcoins.
- gittip.com competitor - funding open source development
- Proof of concept for Off-the-chain transactions for details visit /wiki on Ultra Bitcoin Bank
- Site for people to get medical advice by paying doctors.
- A simple tool, with you can write and read messages to block chain, using transaction data (amounts), public keys or any methods.
 Timetable and Program
 Friday 13th July
- Starting the event, introduction
- Introduce the peoples
- Present your ideas
- Form the teams
- List names and skillsets on whiteboards
- Start hacking!
Hacking can continue throughout the night!
 Saturday 14th July
09:00: Doors open
 Sunday 15th July
- 09:00 Doors open
- 16:00 Demos and presentations
- 17:00 Results announced
- One voted for?
- One judged?
- One voted by community?
 Remote attendance
Set up google hangout (for example), and participate remotely!
Room 77, "The Restaurant at the end of capitalism", will be providing refreshments to the hackathon. In addition, three best teams will have free burgers on Sunday at the official afterparty at Room 77!
Interested in sponsoring the event? Look at Sponsoring-page, and contact us!
Message jeremias on Freenode IRC in #electrum or email email@example.com