Secondary Science software

Hi Anyone aware of science curriculum software (like digital brain) that is (a) web-based and (b) open source? Failing that, we've got some interest in developing some on those criteria - we have manpower, internet server space and bandwidth. You bring developer skills, and/or curriculum knowledge and no summer holidays... documentation volunteers also welcome. Ian? Michael? You in? Open source thin client in secondary schools merely awaits such things... Cheers Chris