The Netsukuku project is based on the very simple idea of exploiting the great potentiality of the wifi connectivity, making the PCs of wireless communities act as routers and handle together an ad-hoc network even bigger than the Internet.
Netsukuku is an ad-hoc network system designed to handle massive numbers of nodes with minimal consumption of CPU and memory resources. It can be used to build a world-wide distributed, fault-tolerant, anonymous, and censorship-immune network, fully independent from the Internet.
Commotion is a free, open-source communication tool that uses mobile phones, computers, and other wireless devices to create decentralized mesh networks. Commotion provides a way for you to share your Internet connection with the people around you, but it is not a replacement for your Internet connection.
OLPC's mission is to empower the world's poorest children through education. "We aim to provide each child with a rugged, low-cost, low-power, connected laptop. To this end, we have designed hardware, content and software for collaborative, joyful, and self-empowered learning. With access to this type of tool, children are engaged in their own education, and learn, share, and create together. They become connected to each other, to the world and to a brighter future."