Jarkko Oikarinen Internet Relay Chat, IRC. (wikipedia)  Jarkko Oikarinen developed the first real-time online chat tool in Finland known as Internet Relay Chat. IRC’s fame took off in 1991.

Christopher Poole 4chan message board. Christopher Poole, known online as “Moot,” started a message board called 4chan where people are free to be wrong. Unlike most web forums, 4chan does not have a registration system, allowing users to post anonymously.

Joshua Schachter Delicious. Del.icio.us is a more sophisticated multiuser version of Muxway, wherein his first implementation of tags. Joshua Schachter began del.icio.us as a way for people to store and share their favorite Web-browsing bookmarks online.

Jeff Bezos Amazon. Jeff Bezos founded the world’s biggest online store known as Amazon, which was originally named Cadabra Inc. He made online shopping faster and more personal than a trip to the local store.

Jack Dorsey Twitter. Jack Dorsey created Twitter to allow friends and family know what he was doing. The world’s fastest-growing communications medium let users broadcast their thoughts in 140 characters or less

Mark Zuckerberg Facebook. Mark Zuckerberg founded Facebook to help students in universities keep in touch with friends. The “status update” started its rebirth in Facebook, where user after user tell their extended network of trusted friends what they’re doing.

Dick Costolo FeedBurner. People generally check their preferred sites every now and then to see if there’s anything new. FeedBurner founder Dick Costolo created a news aggregator that automatically downloads an update that is visible in the places that interest you.

Julian Assange WikiLeaks. Julian Assange founded a website dedicated to publishing classified documents stolen from around the world.

Craig Newmark Craigslist. Craig Newmark started a site that dramatically altered the classified advertising universe called Craiglist.

Chad Hurley, Steve Chen, And Jawed Karim Youtube. Chad Hurley, Steve Chen, and Jawed Karim met as early employees at PayPal. They later started the internet’s most popular video-sharing site YouTube which is broadcasting more than 100 million short videos daily on myriad subjects.

Matt Mullenweg WordPress. Matt Mullenweg founded the world’s most used open source blogging and the greatest boon to freedom of expression known as WordPress. Some of the most popular websites run on WordPress are Techcrunch, Huffingtonpost, Mashable and more.

Reid Hoffman LinkedIn. Reid Hoffman, a former executive vice president at PayPal, created LinkedIn as a professional social network allowing registered users to maintain a list of contact details of people they know and trust in business.

Bram Cohen Bit Torrent. If Napster started the first generation of file sharing , Bram Cohen changed the face of file sharing by developing BitTorrent which has a massive following of users almost instantly.

Niklas Zennstrom Skype. Niklas Zennstrom co-founded the fastest growing communications trend in history called Skype. It offered consumers worldwide a free software for making superior-quality calls using their computer and expanded its offering for Linux, MAC & PC and mobile/ handheld devices.

Jonathan Abrams Friendster. Jonathan Abrams built Friendster, together with Cris Emmanuel, offering many tools to help members find dates.

Stewart Butterfield And Caterina Fake. Flickr. Photosharing website has become a part of everyday online life for millions of people.

Jimmy Wales Wikipedia. Jimmy Wales founded the world’s largest encyclopaedia which carries articles that can easily be edited by anyone who can access the website. It was launched in 2001 and is currently the most popular general reference work on the Internet.

Pierre Morad Omidyar Ebay. Pierre Omidyar set up an online marketplace that brought buyers and sellers together as never before, and pioneered the concept of quantifying the trustworthiness of an anonymous user

Peter Thiel Paypal. Peter Thiel is one of many Web luminaries associated with PayPal. PayPal had enabled people to transfer money to each other instantly.

Shawn Fanning Napster. Shawn Fanning developed Napster, a peer-to-peer file-sharing program designed to let music fans find and trade music.

Brad Fitzpatrick LiveJournal. Brad Fitzpatrick created LiveJournal, one of the earliest blogging platforms. He is seen on the Internet under the nickname bradfitz.

David Filo And Jerry Yang Yahoo. David Filo and Jerry Yang started Yahoo! as a pastime and evolved into a universal brand that has changed the way people communicate with each other, find and access information and purchase things.

Steve Jobs Apple. Steve Jobs innovative idea of a personal computer led him into revolutionizing the computer hardware and software industry.

Bill Gates Microsoft. Bill Gates founded the software company called “Micro-Soft”. a combination of “microcomputer software.” Later on, Bill Gates developed a new GUI (Graphical User Interface) for a disk operating system.

Larry Page And Sergey Brin Google. Larry Page and Sergey Brin changed the way we search and use the Internet. They worked as a seamless team at the top of the search giant. Their company grew rapidly every year since it began.