The Guardian Activate video channel: Recent Episodes

guardian.co.uk

Guardian Activate is a summit aimed at world-changing individuals and communities who have proven that through the use of technology and the internet we can make the world a better place. If you missed a talk or just want to recap memorable presentations from the day, you can download our videos for free on iTunes music store. We'll be releasing a new Activate video every week so stay tuned. With iTunes, you can subscribe to the series and have new talks automatically downloaded.

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James Alexander, co-founder of Zopa and Green Thing.

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Ordnance Survey's Liz Ratcliffe presents at the Guardian's Activate Summit.

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The shadow minister for science and innovation.

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Channel 4's commissioning editor for education and new media delivers a lightning presentation at the Guardian Activate Summit.

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The former minister for transformation calls for better access to government data and a more open approach to technology within government.

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Blue State Digital's founder and the man behind the Obama presidential campaign's digital strategy talks with Emily Bell on the power of technology to initiate a new era of democratic action.

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AMEE's Gavin Starks delivers his lightning presentation at Activate.

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Steve Papa, Endeca, gives his introduction for the panel session on the internet and civilization.

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Next in our series of mind-blowing lightning presentations is Microsoft evangelist Jon Udell.

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Our fourth mind-blowing lightning presentation was from Tom Steinberg, founder of mySociety, a non-profit, open source organisation that runs many of the best-known democracy websites in the UK.

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Nick Bostrom, director, Oxford's Future of Humanity Institute and founder of the world transhumanist foundation offers a mind-bending existential take on artificial intelligence, singularity and life in a post-human world.

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See some of the best bits from the inaugural Guardian Activate Summit held at Guardian HQ in Kings Place, London on 1st July 2009.

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Gerry Jackson, director of SW Radio Africa, broadcasts news into Zimbabwe from London via short-wave radio and SMS messaging services. She delivers a powerful and humbling presentation on the difficulties of providing independent information to a country stripped of its most fundamental freedoms.