In the course of two days, the developers are involved in the hackathon produced web, SMS and phone solutions for the world to change - and will present on Wednesday to Activate

A crowd of geeks descended on the Guardian 's HQ at King' s Cross on the weekend with just a simple, but ambitious to develop ideas to change the world. And boy did they deliver themselves.

The two-day hackathon - organized by the Guardian and Rewired state as part of celebrating this year 's Activate Summit, the role of Web technologies play in shaping a better global future - the developers were from as far afield as the Netherlands to build Germany, India and Sub-Saharan Africa join forces with their domestic counterparts in a number of applications for good.

Driven by a seemingly unlimited supply of cake, coffee and "Hack-your-own" Packed Lunches, worked through the night devs to create applications for large and small - from a compost matchmaking app called TouchyPeely (Order name . Ever ) For a journalistic tool, car games leaked World Bank development projects related U.S. embassy cable, and just about everything else in between.

And while all sacrificed to activate (H) their weekend for a common belief that life through improved technical and data can be involved, there was plenty to attract prey, provide a healthy competitive process.

A previously unreleased Windows 7 Nokia mobile phone and ? 1,000, thanks to sponsors, Nokia and Telefonica, and additional donations of Engineers Without Boarders (EWB), were chipper for a Parrot AR drone (a remote controlled helicopter with a camera attached) competing cash and for the overall winner the chance of a presentation on the Activate summit proper on Wednesday 22 June plus a trip to India to see an EWB project in action. Other prizes include 12 EWB weekend workshops in the UK, a Nokia N8 and a signed 'Baxter' portrait.

Winner of the top gong was an internet and SMS solution called SafeStrip that human trafficking by providing safe and mappable messaging security services designed to prevent development of Chico Charlesworth, Gareth Lloyd and Tom Martin.

The full list of winners is as follows:

Grand Prize Winner - SafeStrip Who created the opportunity to Activate the summit and a trip to India with Engineers Without Borders present to win.

Winner of BlueVia - Scan Campaign , An integrated mobile app, the activists to a full QR code poster campaign for a special occasion, the Parrot AR Drone won generate.

Winner of the Nokia prize- Interact , A self-sustaining, mobile frame, a communication channel between the government / operator and the people who get their opinion if it is really necessary, the ? 1,000 and a Nokia phone is Windows 7 won open.

Winner of the best developer award - Freehoc , A service that its users, their unwanted items by leaves them with other users who want or need them to recycle, and Touchy Peely(Compost, match-making app), both of Engineers Without Borders weekend workshops, including the ability to build a hexayurt (again, I may not) win.

Winner of the most annoying app - Traeder , A text message and phone system for the exchange of alternative currencies, with no special hardware, also won the Engineers Without Borders weekend workshops.

Winner of the best hack crisis - SMS Mapper , This creates crowdsourcing incident maps geolocation with SMS data, and who also won an Engineers Without Borders weekend workshop.

Winner of the laudable mention price - Climate quiz , Which does exactly what it says on the tin, and won a "Baxter Portrait".

Winner of the Best Mashup W5 , The data mining used pull-layers of information in news articles that have won a Nokia N8.

For a complete list of all the hacks from the day - and there were many brilliant ideas that just missed on the various gongs - can be found at http://rewiredstate.org/projects.

To sum up, (H)activate was a truly humbling and inspirational experience. Here we had nearly 80 people who gave up their weekends, and for some the chance to spend Father's Day with their loved ones, not for the glory and prizes (although there was some of that), or the beer and pizza (again, some of that), but to work together on making ideas and concepts that can improve the lives of others.

To activate the focus, creativity and passion of the teams and individuals who have (H) such a great experience, we salute you.

Onwards to Activate 2011 on Wednesday – for more details and to register (there a still a handful of places left) visit http://www.guardian.co.uk/activate.