Archive.org is building a digital library of Internet sites and other cultural artifacts in digital form. Like a paper library, we provide free access to researchers, historians, scholars, the print disabled, and the general public.

Wikitravel is a project to create a free, complete, up-to-date and reliable world-wide travel guide. It is built in collaboration by Wikitravellers from around the globe.

BitTorrent is a protocol supporting the practice of peer-to-peer file sharing that is used to distribute large amounts of data over the Internet. BitTorrent is one of the most common protocols for transferring large files, and peer-to-peer networks have been estimated to collectively account for approximately 43% to 70% of all Internet traffic (depending on geographical location) as of February 2009

Drivers can offer empty seats and passengers can book a ride to their destination. People can check user profiles and choose who they want to ride with, how much space and comfort they need, where they want to meet and what they are willing to pay

OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world. Two major driving forces behind the establishment and growth of OSM have been restrictions on use or availability of map information across much of the world and the advent of inexpensive portable satellite navigation devices.

A Nerdkit is a collection of components, some software, helpful documentation and an active user community. A NerdKits microcontroller kit is appropriate for software hackers looking to branch out into electronics, and has educational material to allow even middle-schoolers and high-schoolers (ages 12+) looking for a fun challenge to learn by doing, especially with the help of a techie parent! A microcontroller is a small computer on a single chip, including processing, memory, and inputs and outputs

Site and community for reporting personal observations of any plant or animal species in the world.

Arduino boards can be purchased pre-assembled or as do-it-yourself kits. Hardware design information is available for those who would like to assemble an Arduino by hand. It was estimated in mid-2011 that over 300,000 official Arduinos had been commercially produced

A research project and a nomadic urban laboratory to explore that complex concept called the urban commons. The project proposes a method where the commons are discussed, defined with parameters and, sometimes, represented in short videos. In addition it creates a networks of people involved on the research about urban commons to organize workshops to mapping commons on main cities around the world.

Astronomers at Las Cumbres Observatory are investigating exoplanets - planets which orbit stars other than our Sun - and you can too. Joining Agent Exoplanet you will study known exoplanets using images taken by LCOGT’s telescopes. You'll measure the brightness of a star while a planet moves between it and our viewpoint.You can examine as many images, from as many exoplanet transit events, as you like and contribute to understanding the properties of each exoplanet.