Spongelab

Founded in 2007, Spongelab Interactive is a leader in advancing the integration of cutting edge technologies for teaching and learning purposes. Their mission is to educate students in the sciences by building content-rich immersive teaching tools designed around discovery-based learning that are accessible to educators and learners at school, at home and in the general public. Spongelab Interactive builds their own products and offers custom production services for the global education community. Spongelab is based in Toronto, Ontario, Canada. (source: http://corporate.spongelab.com/main.cfm?thePG=about)

Home page: http://www.spongelab.com/  

An example. Sponge Lab Biology recently won a National Science Foundation award for the following  interactive activity:
http://www.spongelab.com/slxdev/interactives/buildabody/en/whole/index.html