ClipBucket is a free and open source YouTube, Dailymotion and Vimeo clone script that allows you to make and run your own free video sharing website with lots of advanced features. Enjoy and download your own free video site.
YOURLS is a free URL shortening website creator. Create your own website just like TinyURL or bitly in a short time. You can keep the site private or make it public and share the tiny links with others.
Pligg is an open and free source content management system to create a website where users sign up to share content that is of interest to them. Create your own Digg like website instantly and free with the help of Pligg.
AfterLogic WebMail Lite is a free open source email service for your mail server. Modern, easy to use interface, sending and receiving email messages, storing web contacts and a lot other features come with this free Gmail clone service.
Ja2BU is an open source and free clone of Stack Overflow that will help you make your own question answer website. Download the script of Stack Overflow free and create your own knowledge portal. Comes with an SEO friendly system and users can add comments too.
This is a free open source ehow, Vkontake clone script that helps create social networking websites that lets people connect and interact with other people of same interests.
This is a free open source script for anyone who wants to create their own Wikipedia site. If you want to create a site similar to Wikipedia then MediaWiki is the best choice for creating a Wikipedia site for free. Many people are using this successfully.
This site not only helps you create a professionally made classified website but also helps you do the marketing by providing you with SEO friendly links, a proper user management control, clean script and other features of a professional site.
This is a free and open source Gumtree, Craiglist, OLX, Quikr and Backpage clone script that will allow you to create your own classified ads site in very little time. Best thing is that its free!